Community Water System · PWSID AZ0413039

Mayer Dwid

Serves 1,400 peopleGroundwaterOwner: PrivateChino Valley, Arizona
Nothing open that measures the water, but 1 open testing or paperwork violation.

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 2003: 31 violations. 24 missed or late tests · 7 notices or reports. Most recent began 2025-09-01.

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
0Treatment lapse
24Missed or late test1 open
7Notice or report

More violations on record than 77% 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

2003 · Notice or report: 12004 · Missed or late test: 12004 · Notice or report: 1200520102011 · Notice or report: 12015 · Missed or late test: 22015 · Missed or late test: 22015 · Notice or report: 120152017 · Missed or late test: 12017 · Notice or report: 22017 · Notice or report: 22018 · Missed or late test: 42018 · Missed or late test: 42018 · Missed or late test: 42018 · Missed or late test: 420202021 · Missed or late test: 12022 · Missed or late test: 42022 · Missed or late test: 42022 · Missed or late test: 42022 · Missed or late test: 42023 · Missed or late test: 12023 · Notice or report: 12024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82025 · Missed or late test: 22025 · Missed or late test: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
77% missed or late test · 2423% notice or report · 7

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

3.5 ppb
0 ppb
0 ppb

Open now (1)

  1. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen

Every violation on record

  1. 2025-09-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  2. 2025-07-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  4. 2024-10-01ArsenicMonitoring, RegularBack in compliance
  5. 2024-09-01Revised Total Coliform RuleMONBack in compliance
  6. 2024-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  7. 2024-07-01ArsenicMonitoring, RegularBack in compliance
  8. 2024-07-01NitrateMonitoring, RegularBack in compliance
  9. 2024-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  10. 2024-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  11. 2023-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  12. 2023-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  13. 2022-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  14. 2022-04-01ArsenicMonitoring, RegularBack in compliance
  15. 2022-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  16. 2022-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  17. 2021-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  18. 2018-12-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  19. 2018-12-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  20. 2018-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  21. 2018-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  22. 2017-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  23. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  24. 2017-01-01Revised Total Coliform RuleMONBack in compliance
  25. 2015-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
Show the other 6 entries
  1. 2015-09-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance
  2. 2015-07-01ArsenicMonitoring, RegularBack in compliance
  3. 2011-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  4. 2004-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  5. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  6. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served1,400
Service connections636
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityChino Valley
EPA ZIP on file86323

Areas served

  • Mayer, Yavapai County

Reading this record

Mayer Dwid is a community water system that draws from groundwater and serves about 1,400 people in Chino Valley, 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.