Community Water System · PWSID AZ0414024

City of Yuma

Serves 103,264 peopleSurface WaterOwner: Local GovernmentYuma, Arizona
Nothing open right now.

On record since 2002: 87 violations. 22 over the limit · 1 treatment lapse · 40 missed or late tests · 24 notices or reports. Most recent began 2025-06-01.

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

22Over the limit
1Treatment lapse
40Missed or late test
24Notice or report

More violations on record than 94% 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: 12005 · Notice or report: 12005201020152018 · Missed or late test: 82018 · Missed or late test: 82020 · Over the limit: 62020 · Over the limit: 62020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Notice or report: 62020 · Notice or report: 620202021 · Over the limit: 132021 · Over the limit: 132021 · Over the limit: 132021 · Over the limit: 132021 · Treatment lapse: 12021 · Missed or late test: 172021 · Missed or late test: 172021 · Missed or late test: 172021 · Missed or late test: 172021 · Missed or late test: 172021 · Notice or report: 122021 · Notice or report: 122021 · Notice or report: 122022 · Over the limit: 32022 · Missed or late test: 22022 · Notice or report: 32024 · Missed or late test: 22025 · Missed or late test: 12025
One square ≈ 4 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
25% over the limit · 221% treatment lapse · 146% missed or late test · 4028% notice or report · 24

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×+Chlorine dioxide2022-03-01 · Chlorine dioxide: measured 1.00 MG/L vs limit 0.8000 MG/L (1.2×)2022-02-01 · Chlorine dioxide: measured 1.60 MG/L vs limit 0.8000 MG/L (2.0×)2022-01-01 · Chlorine dioxide: measured 1.30 MG/L vs limit 0.8000 MG/L (1.6×)2021-12-01 · Chlorine dioxide: measured 1.30 MG/L vs limit 0.8000 MG/L (1.6×)2021-11-01 · Chlorine dioxide: measured 1.30 MG/L vs limit 0.8000 MG/L (1.6×)2021-10-01 · Chlorine dioxide: measured 1.00 MG/L vs limit 0.8000 MG/L (1.2×)2021-09-01 · Chlorine dioxide: measured 1.10 MG/L vs limit 0.8000 MG/L (1.4×)2021-08-01 · Chlorine dioxide: measured 1.20 MG/L vs limit 0.8000 MG/L (1.5×)2021-07-01 · Chlorine dioxide: measured 1.50 MG/L vs limit 0.8000 MG/L (1.9×)2021-06-01 · Chlorine dioxide: measured 1.00 MG/L vs limit 0.8000 MG/L (1.2×)2021-05-01 · Chlorine dioxide: measured 1.20 MG/L vs limit 0.8000 MG/L (1.5×)2021-04-01 · Chlorine dioxide: measured 1.10 MG/L vs limit 0.8000 MG/L (1.4×)2021-03-01 · Chlorine dioxide: measured 1.30 MG/L vs limit 0.8000 MG/L (1.6×)2021-02-01 · Chlorine dioxide: measured 2.00 MG/L vs limit 0.8000 MG/L (2.5×)2021-01-01 · Chlorine dioxide: measured 0.9000 MG/L vs limit 0.8000 MG/L (1.1×)2020-12-01 · Chlorine dioxide: measured 1.00 MG/L vs limit 0.8000 MG/L (1.2×)2020-11-01 · Chlorine dioxide: measured 0.9000 MG/L vs limit 0.8000 MG/L (1.1×)2020-10-01 · Chlorine dioxide: measured 0.9000 MG/L vs limit 0.8000 MG/L (1.1×)2020-09-01 · Chlorine dioxide: measured 1.70 MG/L vs limit 0.8000 MG/L (2.1×)2020-08-01 · Chlorine dioxide: measured 1.40 MG/L vs limit 0.8000 MG/L (1.7×)2020-07-01 · Chlorine dioxide: measured 1.00 MG/L vs limit 0.8000 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 3 results on file · action level 15 ppb

1.1 ppb
1.1 ppb
0.79 ppb

Every violation on record

  1. 2025-06-01Chlorine dioxideMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  2. 2024-12-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  3. 2024-12-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  4. 2022-03-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2022-03-01Chlorine dioxideAcute MRDLmeasured 1.00 MG/L · limit 0.8000 MG/LBack in compliance
  6. 2022-02-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2022-02-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  8. 2022-02-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  9. 2022-02-01Chlorine dioxideAcute MRDLmeasured 1.60 MG/L · limit 0.8000 MG/LBack in compliance
  10. 2022-01-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2022-01-01Chlorine dioxideAcute MRDLmeasured 1.30 MG/L · limit 0.8000 MG/LBack in compliance
  12. 2021-12-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2021-12-01Chlorine dioxideAcute MRDLmeasured 1.30 MG/L · limit 0.8000 MG/LBack in compliance
  14. 2021-11-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2021-11-01Chlorine dioxideAcute MRDLmeasured 1.30 MG/L · limit 0.8000 MG/LBack in compliance
  16. 2021-10-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2021-10-01Chlorine dioxideAcute MRDLmeasured 1.00 MG/L · limit 0.8000 MG/LBack in compliance
  18. 2021-10-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  19. 2021-10-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  20. 2021-10-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.8800 RATIOBack in compliance
  21. 2021-09-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  22. 2021-09-01Chlorine dioxideAcute MRDLmeasured 1.10 MG/L · limit 0.8000 MG/LBack in compliance
  23. 2021-09-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  24. 2021-08-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  25. 2021-08-01Chlorine dioxideNon-Acute MRDLBack in compliance
Show the other 62 entries
  1. 2021-08-01Chlorine dioxideAcute MRDLmeasured 1.20 MG/L · limit 0.8000 MG/LBack in compliance
  2. 2021-08-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  3. 2021-08-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  4. 2021-07-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2021-07-01Chlorine dioxideAcute MRDLmeasured 1.50 MG/L · limit 0.8000 MG/LBack in compliance
  6. 2021-06-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2021-06-01Chlorine dioxideAcute MRDLmeasured 1.00 MG/L · limit 0.8000 MG/LBack in compliance
  8. 2021-06-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  9. 2021-06-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  10. 2021-05-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2021-05-01Chlorine dioxideAcute MRDLmeasured 1.20 MG/L · limit 0.8000 MG/LBack in compliance
  12. 2021-05-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  13. 2021-05-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  14. 2021-04-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2021-04-01Chlorine dioxideAcute MRDLmeasured 1.10 MG/L · limit 0.8000 MG/LBack in compliance
  16. 2021-04-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  17. 2021-04-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  18. 2021-03-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2021-03-01Chlorine dioxideAcute MRDLmeasured 1.30 MG/L · limit 0.8000 MG/LBack in compliance
  20. 2021-03-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  21. 2021-03-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  22. 2021-02-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  23. 2021-02-01Chlorine dioxideAcute MRDLmeasured 2.00 MG/L · limit 0.8000 MG/LBack in compliance
  24. 2021-02-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  25. 2021-02-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  26. 2021-01-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  27. 2021-01-01Chlorine dioxideAcute MRDLmeasured 0.9000 MG/L · limit 0.8000 MG/LBack in compliance
  28. 2021-01-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  29. 2021-01-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  30. 2020-12-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  31. 2020-12-01Chlorine dioxideAcute MRDLmeasured 1.00 MG/L · limit 0.8000 MG/LBack in compliance
  32. 2020-12-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  33. 2020-12-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  34. 2020-11-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  35. 2020-11-01Chlorine dioxideAcute MRDLmeasured 0.9000 MG/L · limit 0.8000 MG/LBack in compliance
  36. 2020-11-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  37. 2020-11-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  38. 2020-10-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  39. 2020-10-01Chlorine dioxideAcute MRDLmeasured 0.9000 MG/L · limit 0.8000 MG/LBack in compliance
  40. 2020-10-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  41. 2020-10-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  42. 2020-09-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  43. 2020-09-01Chlorine dioxideAcute MRDLmeasured 1.70 MG/L · limit 0.8000 MG/LBack in compliance
  44. 2020-09-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  45. 2020-09-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  46. 2020-08-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  47. 2020-08-01Chlorine dioxideAcute MRDLmeasured 1.40 MG/L · limit 0.8000 MG/LBack in compliance
  48. 2020-08-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  49. 2020-08-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  50. 2020-07-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  51. 2020-07-01Chlorine dioxideAcute MRDLmeasured 1.00 MG/L · limit 0.8000 MG/LBack in compliance
  52. 2018-09-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  53. 2018-09-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  54. 2018-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  55. 2018-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  56. 2018-08-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  57. 2018-08-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  58. 2018-07-01Chlorine dioxideMonitoring and Reporting (DBP)Back in compliance
  59. 2018-07-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  60. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  61. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  62. 2002-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served103,264
Service connections32,641
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityYuma
EPA ZIP on file85364

Areas served

  • Yuma, Yuma County

Reading this record

City of Yuma is a community water system that draws from surface water and serves about 103,264 people in Yuma, 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.