Community Water System · PWSID 090605011

Mesa Grande (Tract 2)

Serves 43 peopleGroundwaterOwner: Native AmericanSanta Ysabel, California
Nothing open right now.

On record since 2001: 21 violations. 15 missed or late tests · 6 notices or reports. Most recent began 2024-01-01.

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
15Missed or late test
6Notice or report

More violations on record than 93% of active water systems in California. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2001 · Notice or report: 12002 · Notice or report: 12004 · Notice or report: 12005 · Notice or report: 120052006 · Notice or report: 120102013 · Missed or late test: 12014 · Missed or late test: 120152016 · Missed or late test: 12016 · Notice or report: 12020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 102020 · Missed or late test: 1020202023 · Missed or late test: 12024 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
71% missed or late test · 1529% notice or report · 6

Across California, 52% of violations are missed or late tests and 29% 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

10 ppb
5.5 ppb
below 5 ppb

Every violation on record

  1. 2024-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2023-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2020-07-01ChlordaneMonitoring, RegularBack in compliance
  4. 2020-07-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
  5. 2020-07-01HexachlorobenzeneMonitoring, RegularBack in compliance
  6. 2020-07-01Heptachlor epoxideMonitoring, RegularBack in compliance
  7. 2020-07-01HeptachlorMonitoring, RegularBack in compliance
  8. 2020-07-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  9. 2020-07-01ToxapheneMonitoring, RegularBack in compliance
  10. 2020-07-01MethoxychlorMonitoring, RegularBack in compliance
  11. 2020-07-01Bhc-GammaMonitoring, RegularBack in compliance
  12. 2020-07-01EndrinMonitoring, RegularBack in compliance
  13. 2016-04-01Revised Total Coliform RuleOtherBack in compliance
  14. 2016-01-01NitrateMonitoring, RegularBack in compliance
  15. 2014-01-01SodiumMonitoring, RegularBack in compliance
  16. 2013-10-01Dbp Stage 2Failure Submit IDSE/Subpart V Plan RptBack in compliance
  17. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  18. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  19. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  20. 2002-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  21. 2001-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served43
Service connections15
Water sourceGroundwater
System typeCommunity Water System
OwnerNative American
StatusActive
CitySanta Ysabel
EPA ZIP on file92070

Areas served

    Reading this record

    Mesa Grande (Tract 2) is a community water system that draws from groundwater and serves about 43 people in Santa Ysabel, California. 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.