Community Water System · PWSID AZ0414001

Antelope Water Company

Serves 163 peopleSurface WaterOwner: PrivateWellton, 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 2002: 72 violations. 1 treatment lapse · 50 missed or late tests · 21 notices or reports. Most recent began 2025-07-01.

None of them is a measurement of contaminated water.

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

0Over the limit
1Treatment lapse1 open
50Missed or late test
21Notice or report2 open

More violations on record than 92% 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: 12005 · Missed or late test: 12005 · Notice or report: 120052006 · Notice or report: 12007 · Missed or late test: 12008 · Notice or report: 12009 · Notice or report: 12010 · Notice or report: 120102015 · Missed or late test: 220152017 · Missed or late test: 12017 · Notice or report: 12018 · Missed or late test: 32018 · Missed or late test: 32019 · Missed or late test: 32019 · Missed or late test: 32020 · Missed or late test: 62020 · Missed or late test: 62020 · Missed or late test: 62020 · Notice or report: 32020 · Notice or report: 320202021 · Missed or late test: 82021 · Missed or late test: 82021 · Missed or late test: 82021 · Missed or late test: 82022 · Missed or late test: 122022 · Missed or late test: 122022 · Missed or late test: 122022 · Missed or late test: 122022 · Missed or late test: 122022 · Missed or late test: 122022 · Notice or report: 22023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Notice or report: 12024 · Treatment lapse: 12024 · Missed or late test: 22024 · Notice or report: 52024 · Notice or report: 52024 · Notice or report: 52025 · Missed or late test: 42025 · Missed or late test: 42025 · Notice or report: 12025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
1% treatment lapse · 169% missed or late test · 5029% notice or report · 21

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

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 3 results on file · action level 15 ppb

6 ppb
5 ppb
0 ppb

Open now (3)

  1. 2024-12-20Public NoticePN Violation for NPDWR ViolationOpen
  2. 2024-10-17Lead service line inventoryRPTOpen
  3. 2024-10-17Lead service line inventoryTTOpen

Every violation on record

  1. 2025-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  2. 2025-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  3. 2025-07-01Revised Total Coliform RuleRPTBack in compliance
  4. 2025-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  5. 2025-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2024-12-20Public NoticePN Violation for NPDWR ViolationOpen
  7. 2024-10-17Lead service line inventoryRPTOpen
  8. 2024-10-17Lead service line inventoryTTOpen
  9. 2024-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  10. 2024-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  11. 2024-07-01Revised Total Coliform RuleRPTBack in compliance
  12. 2024-03-01Revised Total Coliform RuleRPTBack in compliance
  13. 2024-01-28Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2023-10-01Revised Total Coliform RuleRPTBack in compliance
  15. 2023-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  16. 2023-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  17. 2023-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  18. 2023-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  19. 2023-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  20. 2023-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  21. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  22. 2022-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  23. 2022-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  24. 2022-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  25. 2022-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
Show the other 47 entries
  1. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  2. 2022-08-21Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2022-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  4. 2022-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  5. 2022-03-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2022-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  7. 2022-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  8. 2022-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  9. 2022-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  10. 2022-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  11. 2021-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  12. 2021-11-09Lead and Copper RuleLead Consumer NoticeBack in compliance
  13. 2021-11-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  14. 2021-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  15. 2021-08-01Revised Total Coliform RuleMONBack in compliance
  16. 2021-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  17. 2021-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  18. 2021-01-01Revised Total Coliform RuleMONBack in compliance
  19. 2020-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  20. 2020-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  21. 2020-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  22. 2020-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  23. 2020-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  24. 2020-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  25. 2020-08-05Public NoticePN Violation for NPDWR ViolationBack in compliance
  26. 2020-06-01Revised Total Coliform RuleMONBack in compliance
  27. 2020-05-24Public NoticePN Violation for NPDWR ViolationBack in compliance
  28. 2019-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  29. 2019-04-01Revised Total Coliform RuleMONBack in compliance
  30. 2019-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  31. 2018-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  32. 2018-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  33. 2018-08-19E. ColiMonitoring, Source Water (LT2)Back in compliance
  34. 2017-06-01Revised Total Coliform RuleRPTBack in compliance
  35. 2017-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  36. 2015-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  37. 2015-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  38. 2010-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  39. 2009-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  40. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  41. 2007-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  42. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  43. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  44. 2005-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  45. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  46. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  47. 2002-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served163
Service connections65
Water sourceSurface Water
System typeCommunity Water System
OwnerPrivate
StatusActive
CityWellton
EPA ZIP on file85356

Areas served

  • Mohawk, Yuma County

Reading this record

Antelope Water Company is a community water system that draws from surface water and serves about 163 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.