Community Water System · PWSID AZ0414022

Wellton Town of

Serves 3,000 peopleSurface WaterOwner: Local GovernmentWellton, Arizona
Nothing open that measures the water, but 4 open testing or paperwork violations.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2002: 230 violations. 32 over the limit · 22 treatment lapses · 121 missed or late tests · 55 notices or reports. Most recent began 2025-09-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

32Over the limit
22Treatment lapse
121Missed or late test
55Notice or report4 open

More violations on record than 99% of active water systems in Arizona. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2002 · Notice or report: 12003 · Notice or report: 12004 · Notice or report: 120052006 · Missed or late test: 12006 · Notice or report: 120102013 · Missed or late test: 12014 · Notice or report: 22015 · Missed or late test: 12015 · Notice or report: 120152016 · Over the limit: 42016 · Over the limit: 42016 · Missed or late test: 52016 · Missed or late test: 52016 · Notice or report: 32017 · Over the limit: 42017 · Over the limit: 42017 · Treatment lapse: 22017 · Missed or late test: 92017 · Missed or late test: 92017 · Missed or late test: 92017 · Notice or report: 62017 · Notice or report: 62018 · Over the limit: 22018 · Treatment lapse: 42018 · Treatment lapse: 42018 · Missed or late test: 132018 · Missed or late test: 132018 · Missed or late test: 132018 · Missed or late test: 132018 · Missed or late test: 132018 · Notice or report: 32019 · Over the limit: 22019 · Treatment lapse: 42019 · Treatment lapse: 42019 · Missed or late test: 192019 · Missed or late test: 192019 · Missed or late test: 192019 · Missed or late test: 192019 · Missed or late test: 192019 · Missed or late test: 192019 · Missed or late test: 192019 · Notice or report: 42019 · Notice or report: 42020 · Over the limit: 42020 · Over the limit: 42020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Notice or report: 82020 · Notice or report: 82020 · Notice or report: 820202021 · Over the limit: 42021 · Over the limit: 42021 · Missed or late test: 92021 · Missed or late test: 92021 · Missed or late test: 92021 · Notice or report: 12022 · Over the limit: 42022 · Over the limit: 42022 · Missed or late test: 162022 · Missed or late test: 162022 · Missed or late test: 162022 · Missed or late test: 162022 · Missed or late test: 162022 · Missed or late test: 162022 · Notice or report: 132022 · Notice or report: 132022 · Notice or report: 132022 · Notice or report: 132022 · Notice or report: 132023 · Over the limit: 42023 · Over the limit: 42023 · Treatment lapse: 12023 · Missed or late test: 172023 · Missed or late test: 172023 · Missed or late test: 172023 · Missed or late test: 172023 · Missed or late test: 172023 · Missed or late test: 172023 · Notice or report: 32024 · Over the limit: 42024 · Over the limit: 42024 · Treatment lapse: 52024 · Treatment lapse: 52024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Notice or report: 52024 · Notice or report: 52025 · Treatment lapse: 62025 · Treatment lapse: 62025 · Missed or late test: 132025 · Missed or late test: 132025 · Missed or late test: 132025 · Missed or late test: 132025 · Missed or late test: 132025 · Notice or report: 22025
One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
14% over the limit · 3210% treatment lapse · 2253% missed or late test · 12124% notice or report · 55

Across Arizona, 65% of violations are missed or late tests and 5% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2024-10-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2024-07-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2024-01-01 · Trihalomethanes (TTHM): measured 0.1020 MG/L vs limit 0.0800 MG/L (1.3×)2023-10-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2023-07-01 · Trihalomethanes (TTHM): measured 0.1040 MG/L vs limit 0.0800 MG/L (1.3×)2023-04-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2023-01-01 · Trihalomethanes (TTHM): measured 0.1210 MG/L vs limit 0.0800 MG/L (1.5×)2022-10-01 · Trihalomethanes (TTHM): measured 0.1230 MG/L vs limit 0.0800 MG/L (1.5×)2022-07-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2022-04-01 · Trihalomethanes (TTHM): measured 0.1120 MG/L vs limit 0.0800 MG/L (1.4×)2022-01-01 · Trihalomethanes (TTHM): measured 0.1150 MG/L vs limit 0.0800 MG/L (1.4×)2021-10-01 · Trihalomethanes (TTHM): measured 0.1240 MG/L vs limit 0.0800 MG/L (1.6×)2021-07-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1310 MG/L vs limit 0.0800 MG/L (1.6×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1330 MG/L vs limit 0.0800 MG/L (1.7×)2020-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1170 MG/L vs limit 0.0800 MG/L (1.5×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1190 MG/L vs limit 0.0800 MG/L (1.5×)2020-01-01 · Trihalomethanes (TTHM): measured 0.1010 MG/L vs limit 0.0800 MG/L (1.3×)2019-07-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2018-10-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2018-01-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2017-10-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2017-07-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2017-04-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2017-01-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2016-10-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2016-07-01 · Trihalomethanes (TTHM): measured 0.1020 MG/L vs limit 0.0800 MG/L (1.3×)2016-04-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2016-01-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 4 results on file · action level 15 ppb

1.3 ppb
1.3 ppb
0 ppb
0 ppb

Open now (4)

  1. 2024-09-22Public NoticePN Violation for NPDWR ViolationOpen
  2. 2020-12-19Public Notice ×2PN Violation for NPDWR ViolationOpen
  3. 2020-02-17Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-09-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  2. 2025-07-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2025-07-01Gross Alpha, Excl. Radon and UMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-07-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2025-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2025-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  7. 2025-07-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.1800 RATIO · limit 1.00 RATIOPeriod ended · no return to compliance on file
  8. 2025-07-01Revised Total Coliform RuleRPTBack in compliance
  9. 2025-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  10. 2025-05-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  11. 2025-05-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  12. 2025-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  13. 2025-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  14. 2025-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  15. 2025-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  16. 2025-04-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.0500 RATIOPeriod ended · no return to compliance on file
  17. 2025-04-01Gross Alpha, Excl. Radon and UMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2025-04-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2025-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  20. 2025-01-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.1100 RATIO · limit 1.00 RATIOPeriod ended · no return to compliance on file
  21. 2025-01-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2024-10-17Lead service line inventoryRPTBack in compliance
  23. 2024-10-17Lead service line inventoryTTBack in compliance
  24. 2024-10-01Gross Alpha, Excl. Radon and UMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2024-10-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 202 entries
  1. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2024-09-22Public NoticePN Violation for NPDWR ViolationOpen
  3. 2024-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  4. 2024-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  5. 2024-08-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2024-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  7. 2024-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  8. 2024-07-01ArsenicMonitoring, RegularBack in compliance
  9. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2024-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  11. 2024-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  12. 2024-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  13. 2024-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  14. 2024-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  15. 2024-05-31Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  16. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1020 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2023-11-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2023-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  20. 2023-11-01Revised Total Coliform RuleRPTBack in compliance
  21. 2023-10-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  22. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2023-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  24. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1040 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  25. 2023-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  26. 2023-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  27. 2023-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  28. 2023-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  29. 2023-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  30. 2023-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  31. 2023-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  32. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  33. 2023-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  34. 2023-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  35. 2023-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  36. 2023-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  37. 2023-01-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  38. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1210 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  39. 2023-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  40. 2023-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  41. 2023-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  42. 2023-01-01Revised Total Coliform RuleRPTBack in compliance
  43. 2022-12-04Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  44. 2022-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  45. 2022-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1230 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  46. 2022-10-01ArsenicMonitoring, RegularBack in compliance
  47. 2022-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  48. 2022-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  49. 2022-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  50. 2022-09-01Revised Total Coliform RuleRPTBack in compliance
  51. 2022-08-28Public NoticePN Violation for NPDWR ViolationBack in compliance
  52. 2022-07-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  53. 2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  54. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  55. 2022-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  56. 2022-06-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  57. 2022-06-01Revised Total Coliform RuleRPTBack in compliance
  58. 2022-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  59. 2022-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  60. 2022-05-29Public NoticePN Violation for NPDWR ViolationBack in compliance
  61. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1120 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  62. 2022-04-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  63. 2022-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  64. 2022-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  65. 2022-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  66. 2022-04-01ArsenicMonitoring, RegularBack in compliance
  67. 2022-03-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  68. 2022-03-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  69. 2022-03-01Revised Total Coliform RuleRPTBack in compliance
  70. 2022-02-17Public NoticePN Violation for NPDWR ViolationBack in compliance
  71. 2022-01-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  72. 2022-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  73. 2022-01-01Revised Total Coliform RuleRPTBack in compliance
  74. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1150 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  75. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1240 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  76. 2021-08-18Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  77. 2021-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  78. 2021-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  79. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  80. 2021-07-01Revised Total Coliform RuleMONBack in compliance
  81. 2021-05-15Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  82. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1310 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  83. 2021-04-01Revised Total Coliform RuleMONBack in compliance
  84. 2021-02-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  85. 2021-02-17Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  86. 2021-02-01Revised Total Coliform RuleMONBack in compliance
  87. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1330 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  88. 2021-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  89. 2020-12-24Public NoticePN Violation for NPDWR ViolationBack in compliance
  90. 2020-12-19Public Notice ×2PN Violation for NPDWR ViolationOpen
  91. 2020-12-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  92. 2020-12-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  93. 2020-12-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  94. 2020-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  95. 2020-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  96. 2020-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  97. 2020-10-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  98. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  99. 2020-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  100. 2020-09-26Public NoticePN Violation for NPDWR ViolationBack in compliance
  101. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1170 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  102. 2020-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  103. 2020-04-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  104. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1190 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  105. 2020-02-17Public NoticePN Violation for NPDWR ViolationOpen
  106. 2020-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  107. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1010 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  108. 2020-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  109. 2019-11-01Revised Total Coliform RuleMONBack in compliance
  110. 2019-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  111. 2019-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  112. 2019-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  113. 2019-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  114. 2019-09-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  115. 2019-09-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  116. 2019-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  117. 2019-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  118. 2019-08-01Revised Total Coliform RuleMONBack in compliance
  119. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  120. 2019-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  121. 2019-07-01Carbon, TotalMonitoring and Reporting (DBP)Back in compliance
  122. 2019-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  123. 2019-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  124. 2019-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  125. 2019-05-01Revised Total Coliform RuleRPTBack in compliance
  126. 2019-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  127. 2019-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  128. 2019-05-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  129. 2019-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  130. 2019-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  131. 2019-04-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  132. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  133. 2019-03-01Revised Total Coliform RuleRPTBack in compliance
  134. 2019-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  135. 2019-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  136. 2019-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  137. 2019-01-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  138. 2018-11-01Revised Total Coliform RuleRPTBack in compliance
  139. 2018-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  140. 2018-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  141. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  142. 2018-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  143. 2018-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  144. 2018-07-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  145. 2018-07-01Revised Total Coliform RuleMONBack in compliance
  146. 2018-06-24E. ColiMonitoring, Source Water (LT2)Back in compliance
  147. 2018-06-01Revised Total Coliform RuleRPTBack in compliance
  148. 2018-04-15E. ColiMonitoring, Source Water (LT2)Back in compliance
  149. 2018-04-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  150. 2018-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  151. 2018-04-01E. ColiMonitoring, Source Water (LT2)Back in compliance
  152. 2018-04-01Revised Total Coliform RuleMONBack in compliance
  153. 2018-02-04E. ColiMonitoring, Source Water (LT2)Back in compliance
  154. 2018-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  155. 2018-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  156. 2018-01-07E. ColiMonitoring, Source Water (LT2)Back in compliance
  157. 2018-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  158. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  159. 2018-01-01Revised Total Coliform RuleRPTBack in compliance
  160. 2017-12-24E. ColiMonitoring, Source Water (LT2)Back in compliance
  161. 2017-12-10E. ColiMonitoring, Source Water (LT2)Back in compliance
  162. 2017-11-03Lead and Copper RuleLead Consumer NoticeBack in compliance
  163. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  164. 2017-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  165. 2017-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  166. 2017-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  167. 2017-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  168. 2017-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  169. 2017-09-01Revised Total Coliform RuleRPTBack in compliance
  170. 2017-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  171. 2017-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  172. 2017-08-01Revised Total Coliform RuleRPTBack in compliance
  173. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  174. 2017-07-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  175. 2017-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  176. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  177. 2017-05-01Revised Total Coliform RuleRPTBack in compliance
  178. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  179. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  180. 2017-01-01Revised Total Coliform RuleRPTBack in compliance
  181. 2016-12-01Revised Total Coliform RuleRPTBack in compliance
  182. 2016-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  183. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  184. 2016-10-01Revised Total Coliform RuleMONBack in compliance
  185. 2016-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  186. 2016-09-01Revised Total Coliform RuleMONBack in compliance
  187. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  188. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1020 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  189. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  190. 2016-03-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  191. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  192. 2016-01-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  193. 2015-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  194. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  195. 2014-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  196. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  197. 2013-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  198. 2006-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  199. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  200. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  201. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  202. 2002-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served3,000
Service connections1,573
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWellton
EPA ZIP on file85356

Areas served

  • Wellton, Yuma County

Reading this record

Wellton Town of is a community water system that draws from surface water and serves about 3,000 people in Wellton, Arizona. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.