Community Water System · PWSID MI0040046

Guernsey Lake Mobile Home Community

Serves 100 peopleGroundwaterOwner: PrivatePhoenix, Arizona
Nothing open that measures the water, but 2 open testing or paperwork violations.

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 2007: 59 violations. 2 treatment lapses · 51 missed or late tests · 6 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
2Treatment lapse
51Missed or late test1 open
6Notice or report1 open

More violations on record than 89% 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

20052007 · Notice or report: 1201020152016 · Missed or late test: 12017 · Notice or report: 22018 · Treatment lapse: 22018 · Missed or late test: 120202021 · Notice or report: 12022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472022 · Missed or late test: 472024 · Missed or late test: 12024 · Notice or report: 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.
3% treatment lapse · 286% missed or late test · 5110% notice or report · 6

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

Open now (2)

  1. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  2. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen

Every violation on record

  1. 2025-09-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  2. 2024-11-11Revised Total Coliform RuleRPTBack in compliance
  3. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  4. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  5. 2022-01-01ChlordaneMonitoring, RegularBack in compliance
  6. 2022-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
  7. 2022-01-01PentachlorophenolMonitoring, RegularBack in compliance
  8. 2022-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  9. 2022-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  10. 2022-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  11. 2022-01-012, 4-DMonitoring, RegularBack in compliance
  12. 2022-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  13. 2022-01-01HeptachlorMonitoring, RegularBack in compliance
  14. 2022-01-01LassoMonitoring, RegularBack in compliance
  15. 2022-01-01AtrazineMonitoring, RegularBack in compliance
  16. 2022-01-01AldicarbMonitoring, RegularBack in compliance
  17. 2022-01-01CarbofuranMonitoring, RegularBack in compliance
  18. 2022-01-01Aldicarb sulfoneMonitoring, RegularBack in compliance
  19. 2022-01-01Aldicarb sulfoxideMonitoring, RegularBack in compliance
  20. 2022-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  21. 2022-01-01DinosebMonitoring, RegularBack in compliance
  22. 2022-01-01PicloramMonitoring, RegularBack in compliance
  23. 2022-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  24. 2022-01-01SimazineMonitoring, RegularBack in compliance
  25. 2022-01-01OxamylMonitoring, RegularBack in compliance
Show the other 34 entries
  1. 2022-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  2. 2022-01-01ToxapheneMonitoring, RegularBack in compliance
  3. 2022-01-01MethoxychlorMonitoring, RegularBack in compliance
  4. 2022-01-01Bhc-GammaMonitoring, RegularBack in compliance
  5. 2022-01-01EndrinMonitoring, RegularBack in compliance
  6. 2022-01-01StyreneMonitoring, RegularBack in compliance
  7. 2022-01-01EthylbenzeneMonitoring, RegularBack in compliance
  8. 2022-01-01TolueneMonitoring, RegularBack in compliance
  9. 2022-01-01BenzeneMonitoring, RegularBack in compliance
  10. 2022-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  11. 2022-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  12. 2022-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  13. 2022-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  14. 2022-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  15. 2022-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  16. 2022-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  17. 2022-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  18. 2022-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  19. 2022-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  20. 2022-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  21. 2022-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  22. 2022-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  23. 2022-01-01DichloromethaneMonitoring, RegularBack in compliance
  24. 2022-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  25. 2022-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  26. 2022-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  27. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  28. 2018-10-11Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  29. 2018-03-16Revised Total Coliform RuleTTBack in compliance
  30. 2018-01-01Revised Total Coliform RuleTTBack in compliance
  31. 2017-11-01Revised Total Coliform RuleRPTBack in compliance
  32. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  33. 2016-12-01Revised Total Coliform RuleMONBack in compliance
  34. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served100
Service connections40
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityPhoenix
EPA ZIP on file85018

Areas served

  • Barry County

Reading this record

Guernsey Lake Mobile Home Community is a community water system that draws from groundwater and serves about 100 people in Phoenix, 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.