Community Water System · PWSID AZ0415123

Cibola Water Improvement District

Serves 197 peopleSurface WaterOwner: PrivateTucson, Arizona
1 open treatment violation.

Open for: Lead service line inventory. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2011: 141 violations. 34 over the limit · 2 treatment lapses · 78 missed or late tests · 27 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.

34Over the limit
2Treatment lapse1 open
78Missed or late test5 open
27Notice or report7 open

More violations on record than 97% 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

200520102011 · Notice or report: 12012 · Over the limit: 12014 · Over the limit: 32014 · Notice or report: 12015 · Over the limit: 42015 · Missed or late test: 320152016 · Over the limit: 42016 · Missed or late test: 62016 · Missed or late test: 62017 · Over the limit: 22017 · Missed or late test: 92017 · Missed or late test: 92017 · Missed or late test: 92017 · Notice or report: 12018 · Over the limit: 42018 · Missed or late test: 42018 · Notice or report: 22019 · Over the limit: 42019 · Missed or late test: 12019 · Notice or report: 22020 · Over the limit: 42020 · Missed or late test: 12020 · Notice or report: 220202021 · Over the limit: 32021 · Missed or late test: 12022 · Missed or late test: 52022 · Missed or late test: 52022 · Notice or report: 12023 · Over the limit: 32023 · Treatment lapse: 12023 · Missed or late test: 102023 · Missed or late test: 102023 · Missed or late test: 102023 · Notice or report: 32024 · Over the limit: 22024 · Treatment lapse: 12024 · Missed or late test: 252024 · Missed or late test: 252024 · Missed or late test: 252024 · Missed or late test: 252024 · Missed or late test: 252024 · Missed or late test: 252024 · Missed or late test: 252024 · Notice or report: 102024 · Notice or report: 102024 · Notice or report: 102025 · Missed or late test: 132025 · Missed or late test: 132025 · Missed or late test: 132025 · Missed or late test: 132025 · Notice or report: 42025
One square ≈ 4 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
24% over the limit · 341% treatment lapse · 255% missed or late test · 7819% notice or report · 27

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)2024-04-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2023-10-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2023-07-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2023-04-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2021-07-01 · Trihalomethanes (TTHM): measured 0.0810 MG/L vs limit 0.0800 MG/L (1.0×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1070 MG/L vs limit 0.0800 MG/L (1.3×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1140 MG/L vs limit 0.0800 MG/L (1.4×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1090 MG/L vs limit 0.0800 MG/L (1.4×)2020-04-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2020-01-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2019-07-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2019-01-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2018-10-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2018-07-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2018-04-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2018-01-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2017-10-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2017-07-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2016-10-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2016-07-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2016-04-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2016-01-01 · Trihalomethanes (TTHM): measured 0.1010 MG/L vs limit 0.0800 MG/L (1.3×)2015-10-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2015-07-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2015-04-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2015-01-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2014-10-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2014-07-01 · Trihalomethanes (TTHM): measured 0.1070 MG/L vs limit 0.0800 MG/L (1.3×)2014-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2012-01-01 · Trihalomethanes (TTHM): measured 0.1450 MG/L vs limit 0.0800 MG/L (1.8×)
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 8 results on file · action level 15 ppb

3 ppb
3 ppb
2 ppb
1.5 ppb
1.5 ppb
0 ppb
0 ppb
0 ppb

Open now (13)

  1. 2025-08-07Public NoticePN Violation for NPDWR ViolationOpen
  2. 2025-04-02Public NoticePN Violation without NPDWR ViolationOpen
  3. 2024-12-20Public NoticePN Violation for NPDWR ViolationOpen
  4. 2024-10-17Lead service line inventoryTTOpen
  5. 2024-10-17Lead service line inventoryRPTOpen
  6. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  7. 2024-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  8. 2024-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  9. 2024-06-30Public NoticePN Violation for NPDWR ViolationOpen
  10. 2024-03-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  11. 2024-03-03Public NoticePN Violation for NPDWR ViolationOpen
  12. 2024-01-01Lead and Copper RuleLead Consumer NoticeOpen
  13. 2022-10-01Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-09-01Surface water treatment (SWTR) ×2Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  2. 2025-08-07Public NoticePN Violation for NPDWR ViolationOpen
  3. 2025-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  4. 2025-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  5. 2025-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  6. 2025-07-01Revised Total Coliform RuleRPTBack in compliance
  7. 2025-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  8. 2025-06-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  9. 2025-05-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2025-04-02Public NoticePN Violation without NPDWR ViolationOpen
  11. 2025-04-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  12. 2025-04-01Surface water treatment (SWTR) ×2Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  13. 2025-03-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  14. 2025-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  15. 2025-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  16. 2024-12-20Public NoticePN Violation for NPDWR ViolationOpen
  17. 2024-10-17Lead service line inventoryTTOpen
  18. 2024-10-17Lead service line inventoryRPTOpen
  19. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  20. 2024-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  21. 2024-10-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2024-10-01Revised Total Coliform RuleRPTBack in compliance
  23. 2024-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  24. 2024-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  25. 2024-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
Show the other 113 entries
  1. 2024-09-01Revised Total Coliform RuleMONBack in compliance
  2. 2024-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  3. 2024-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  4. 2024-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  5. 2024-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  6. 2024-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  7. 2024-06-30Public NoticePN Violation for NPDWR ViolationOpen
  8. 2024-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  9. 2024-06-01Revised Total Coliform RuleMONBack in compliance
  10. 2024-05-01Revised Total Coliform RuleRPTBack in compliance
  11. 2024-04-26Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  12. 2024-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  13. 2024-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  14. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2024-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  16. 2024-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  17. 2024-04-01Revised Total Coliform RuleRPTBack in compliance
  18. 2024-03-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  19. 2024-03-03Public NoticePN Violation for NPDWR ViolationOpen
  20. 2024-03-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  21. 2024-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  22. 2024-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  23. 2024-02-23Public NoticePN Violation for NPDWR ViolationBack in compliance
  24. 2024-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  25. 2024-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  26. 2024-01-01Lead and Copper RuleLead Consumer NoticeOpen
  27. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  28. 2023-12-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  29. 2023-12-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  30. 2023-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  31. 2023-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  32. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  33. 2023-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  34. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  35. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  36. 2023-04-01Revised Total Coliform RuleRPTBack in compliance
  37. 2023-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  38. 2023-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  39. 2023-02-01Revised Total Coliform RuleRPTBack in compliance
  40. 2023-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  41. 2023-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  42. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  43. 2023-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  44. 2023-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  45. 2022-11-10Lead and Copper RuleLead Consumer NoticeBack in compliance
  46. 2022-10-01Public NoticePN Violation for NPDWR ViolationOpen
  47. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  48. 2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  49. 2022-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  50. 2022-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  51. 2021-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  52. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0810 MG/L · limit 0.0800 MG/LBack in compliance
  53. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1070 MG/L · limit 0.0800 MG/LBack in compliance
  54. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1140 MG/L · limit 0.0800 MG/LBack in compliance
  55. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LBack in compliance
  56. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1090 MG/L · limit 0.0800 MG/LBack in compliance
  57. 2020-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  58. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LBack in compliance
  59. 2020-01-11Unknown contaminantOperations ReportBack in compliance
  60. 2020-01-01Revised Total Coliform RuleRPTBack in compliance
  61. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LBack in compliance
  62. 2019-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  63. 2019-10-01Revised Total Coliform RuleRPTBack in compliance
  64. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LBack in compliance
  65. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LBack in compliance
  66. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0880 MG/L · limit 0.0800 MG/LBack in compliance
  67. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LBack in compliance
  68. 2019-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  69. 2018-11-01Revised Total Coliform RuleRPTBack in compliance
  70. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LBack in compliance
  71. 2018-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  72. 2018-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  73. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LBack in compliance
  74. 2018-05-01Revised Total Coliform RuleRPTBack in compliance
  75. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LBack in compliance
  76. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LBack in compliance
  77. 2018-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  78. 2018-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  79. 2017-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  80. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LBack in compliance
  81. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  82. 2017-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  83. 2017-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  84. 2017-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  85. 2017-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  86. 2017-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  87. 2017-02-01Revised Total Coliform RuleRPTBack in compliance
  88. 2017-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  89. 2017-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  90. 2017-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  91. 2016-11-01Revised Total Coliform RuleMONBack in compliance
  92. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LBack in compliance
  93. 2016-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  94. 2016-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  95. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  96. 2016-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  97. 2016-04-01Revised Total Coliform RuleMONBack in compliance
  98. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  99. 2016-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  100. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1010 MG/L · limit 0.0800 MG/LBack in compliance
  101. 2015-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  102. 2015-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  103. 2015-10-01NitrateMonitoring, RegularBack in compliance
  104. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LBack in compliance
  105. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LBack in compliance
  106. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LBack in compliance
  107. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LBack in compliance
  108. 2014-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LBack in compliance
  109. 2014-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  110. 2014-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1070 MG/L · limit 0.0800 MG/LBack in compliance
  111. 2014-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  112. 2012-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1450 MG/L · limit 0.0800 MG/LBack in compliance
  113. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served197
Service connections188
Water sourceSurface Water
System typeCommunity Water System
OwnerPrivate
StatusActive
CityTucson
EPA ZIP on file85754

Areas served

  • Cibola, La Paz County

Reading this record

Cibola Water Improvement District is a community water system that draws from surface water and serves about 197 people in Tucson, 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.