Community Water System · PWSID AZ0415027

Epcor - Parker Dam

Serves 429 peopleSurface WaterOwner: PrivateEl Mirage, Arizona
Nothing open right now.

On record since 1992: 96 violations. 4 over the limit · 9 treatment lapses · 62 missed or late tests · 21 notices or reports. Most recent began 2023-10-01.

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

4Over the limit
9Treatment lapse
62Missed or late test
21Notice or report

More violations on record than 95% 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

1992 · Treatment lapse: 1199520002002 · Notice or report: 12003 · Notice or report: 12004 · Missed or late test: 12004 · Notice or report: 12005 · Missed or late test: 12005 · Notice or report: 120052006 · Missed or late test: 12006 · Notice or report: 12007 · Missed or late test: 12007 · Notice or report: 12008 · Notice or report: 12009 · Missed or late test: 12010 · Missed or late test: 12010 · Notice or report: 120102011 · Notice or report: 22012 · Missed or late test: 22012 · Notice or report: 12014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Missed or late test: 102014 · Notice or report: 12015 · Treatment lapse: 32015 · Missed or late test: 212015 · Missed or late test: 212015 · Missed or late test: 212015 · Missed or late test: 212015 · Missed or late test: 212015 · Missed or late test: 212015 · Missed or late test: 212015 · Notice or report: 220152017 · Over the limit: 12018 · Over the limit: 32018 · Missed or late test: 112018 · Missed or late test: 112018 · Missed or late test: 112018 · Missed or late test: 112019 · Notice or report: 12020 · Treatment lapse: 52020 · Treatment lapse: 52020 · Missed or late test: 92020 · Missed or late test: 92020 · Missed or late test: 92020 · Notice or report: 42020 · Notice or report: 420202021 · Missed or late test: 22021 · Notice or report: 22023 · Missed or late test: 12025
One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
4% over the limit · 49% treatment lapse · 965% missed or late test · 6222% notice or report · 21

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)2018-07-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2018-04-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2018-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2017-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)
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

12 ppb
9.7 ppb
9.6 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2023-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  2. 2021-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  3. 2021-07-02Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  4. 2021-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  5. 2020-11-10Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  6. 2020-10-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  7. 2020-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  8. 2020-09-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  9. 2020-08-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  10. 2020-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  11. 2020-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  12. 2020-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  13. 2020-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  14. 2020-04-11Unknown contaminantOperations ReportBack in compliance
  15. 2020-04-10Unknown contaminantOperations ReportBack in compliance
  16. 2020-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  17. 2020-02-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  18. 2020-02-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  19. 2020-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  20. 2020-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  21. 2020-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  22. 2019-10-11Unknown contaminantOperations ReportBack in compliance
  23. 2018-10-14E. ColiMonitoring, Source Water (LT2)Back in compliance
  24. 2018-08-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  25. 2018-08-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
Show the other 69 entries
  1. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  2. 2018-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  3. 2018-04-01Revised Total Coliform RuleMONBack in compliance
  4. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0880 MG/L · limit 0.0800 MG/LBack in compliance
  5. 2018-03-04E. ColiMonitoring, Source Water (LT2)Back in compliance
  6. 2018-02-18E. ColiMonitoring, Source Water (LT2)Back in compliance
  7. 2018-02-01Revised Total Coliform RuleMONBack in compliance
  8. 2018-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  9. 2018-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  10. 2018-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  11. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  12. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  13. 2015-11-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  14. 2015-10-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  15. 2015-10-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  16. 2015-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  17. 2015-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2015-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  19. 2015-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  20. 2015-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  21. 2015-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  23. 2015-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  24. 2015-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  25. 2015-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  26. 2015-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  27. 2015-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  28. 2015-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  29. 2015-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  30. 2015-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  31. 2015-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  32. 2015-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  33. 2015-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  34. 2015-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  35. 2015-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  36. 2015-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  37. 2015-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  38. 2015-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  39. 2014-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  40. 2014-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  41. 2014-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  42. 2014-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  43. 2014-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  44. 2014-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  45. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  46. 2014-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  47. 2014-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  48. 2014-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  49. 2014-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  50. 2012-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  51. 2012-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  52. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  53. 2011-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  54. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  55. 2010-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  56. 2010-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  57. 2009-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  58. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  59. 2007-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  60. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  61. 2006-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  62. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  63. 2005-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  64. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  65. 2004-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  66. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  67. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  68. 2002-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  69. 1992-01-01Surface water treatment (SWTR)Failure to Filter (SWTR)Back in compliance

System details

Population served429
Service connections195
Water sourceSurface Water
System typeCommunity Water System
OwnerPrivate
StatusActive
CityEl Mirage
EPA ZIP on file85335

Areas served

  • Parker, La Paz County

Reading this record

Epcor - Parker Dam is a community water system that draws from surface water and serves about 429 people in El Mirage, 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.