Community Water System · PWSID CA2400209

San Luis Hills

Serves 779 peopleSurface WaterOwner: PrivateLos Banos, California
Nothing open right now.

On record since 2012: 24 violations. 4 over the limit · 20 treatment lapses. Most recent began 2022-07-01.

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

4Over the limit
20Treatment lapse
0Missed or late test
0Notice or report

More violations on record than 94% 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

200520102012 · Treatment lapse: 42012 · Treatment lapse: 42012 · Treatment lapse: 42012 · Treatment lapse: 42013 · Treatment lapse: 42013 · Treatment lapse: 42013 · Treatment lapse: 42013 · Treatment lapse: 42014 · Over the limit: 12014 · Treatment lapse: 42014 · Treatment lapse: 42014 · Treatment lapse: 42014 · Treatment lapse: 42015 · Over the limit: 12015 · Treatment lapse: 22015 · Treatment lapse: 220152017 · Treatment lapse: 12018 · Treatment lapse: 42018 · Treatment lapse: 42018 · Treatment lapse: 42018 · Treatment lapse: 42019 · Treatment lapse: 120202022 · Over the limit: 22022 · Over the limit: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
17% over the limit · 483% treatment lapse · 20

Across California, 52% of violations are missed or late tests and 29% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2022-07-01 · Trihalomethanes (TTHM): measured 84.00 UG/L vs limit 80.00 UG/L (1.1×)2022-01-01 · Trihalomethanes (TTHM): measured 82.00 UG/L vs limit 80.00 UG/L (1.0×)2015-01-01 · Trihalomethanes (TTHM): measured 91.00 UG/L vs limit 80.00 UG/L (1.1×)2014-10-01 · Trihalomethanes (TTHM): measured 93.00 UG/L vs limit 80.00 UG/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 4 results on file · action level 15 ppb

6.5 ppb
0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  2. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 82.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  3. 2019-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  4. 2018-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  5. 2018-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  6. 2018-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  7. 2018-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  8. 2017-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  9. 2015-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  10. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 91.00 UG/L · limit 80.00 UG/LBack in compliance
  11. 2015-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  12. 2014-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  13. 2014-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 93.00 UG/L · limit 80.00 UG/LBack in compliance
  14. 2014-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  15. 2014-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  16. 2014-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  17. 2013-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  18. 2013-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  19. 2013-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  20. 2013-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  21. 2012-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  22. 2012-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  23. 2012-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  24. 2012-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance

System details

Population served779
Service connections65
Water sourceSurface Water
System typeCommunity Water System
OwnerPrivate
StatusActive
CityLos Banos
EPA ZIP on file93635

Areas served

  • Merced County

Reading this record

San Luis Hills is a community water system that draws from surface water and serves about 779 people in Los Banos, 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.