Non-Transient Non-Community · PWSID CA3710053

Dhs Border Patrol Hwy 94 Checkpoint

Serves 25,083 peopleGroundwater Under InfluenceOwner: FederalSan Diego, California
2 open treatment violations.

Open for: Surface water treatment (SWTR). EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2013: 23 violations. 8 over the limit · 2 treatment lapses · 7 missed or late tests · 6 notices or reports. Most recent began 2025-04-01.

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

8Over the limit
2Treatment lapse2 open
7Missed or late test
6Notice 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

200520102013 · Treatment lapse: 12015 · Missed or late test: 22015 · Missed or late test: 22015 · Notice or report: 22015 · Notice or report: 220152016 · Over the limit: 12016 · Missed or late test: 22016 · Missed or late test: 22016 · Notice or report: 42016 · Notice or report: 42016 · Notice or report: 42016 · Notice or report: 420202021 · Treatment lapse: 12021 · Missed or late test: 22021 · Missed or late test: 22022 · Missed or late test: 12023 · Over the limit: 22023 · Over the limit: 22024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42025 · Over the limit: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
35% over the limit · 89% treatment lapse · 230% missed or late test · 726% notice or report · 6

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)2016-01-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)
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 17 results on file · action level 15 ppb

64 ppb
36.2 ppb
35.2 ppb
29 ppb
21 ppb
17 ppb
9.2 ppb
6 ppb
5.8 ppb
0.44 ppb
0.19 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb
0 ppb

Open now (2)

  1. 2021-12-10Surface water treatment (SWTR)Failure to Filter (SWTR)Open
  2. 2013-08-28Surface water treatment (SWTR)Failure to Filter (SWTR)Open

Every violation on record

  1. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 90.00 UG/LPeriod ended · no return to compliance on file
  2. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 96.00 UG/LPeriod ended · no return to compliance on file
  3. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 134.00 UG/LPeriod ended · no return to compliance on file
  4. 2024-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 68.80 UG/LPeriod ended · no return to compliance on file
  5. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 101.00 UG/LPeriod ended · no return to compliance on file
  6. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 86.00 UG/LPeriod ended · no return to compliance on file
  7. 2022-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  8. 2021-12-10Surface water treatment (SWTR)Failure to Filter (SWTR)Open
  9. 2021-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  10. 2021-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  11. 2016-11-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2016-10-01Trihalomethanes (TTHM)Monitoring, Routine (IDSE)Back in compliance
  13. 2016-07-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2016-07-01Trihalomethanes (TTHM)Monitoring, Routine (IDSE)Back in compliance
  15. 2016-05-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  16. 2016-01-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LBack in compliance
  18. 2015-11-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2015-10-01Trihalomethanes (TTHM)Monitoring, Routine (IDSE)Back in compliance
  20. 2015-07-01Trihalomethanes (TTHM)Monitoring, Routine (IDSE)Back in compliance
  21. 2015-04-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  22. 2013-08-28Surface water treatment (SWTR)Failure to Filter (SWTR)Open

System details

Population served25,083
Service connections1
Water sourceGroundwater Under Influence
System typeNon-Transient Non-Community
OwnerFederal
StatusActive
CitySan Diego
EPA ZIP on file92154

Areas served

  • San Diego County

Reading this record

Dhs Border Patrol Hwy 94 Checkpoint is a non-transient non-community that draws from groundwater under influence and serves about 25,083 people in San Diego, 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.