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Tap water quality report

Willowside Terrace Water Association

EPA monitoring tested this supplier for 14 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

14
contaminants tested
3
detected
100
people served
47
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
San Diego

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

47
health-based violations
71
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2024-10-17
MCL Health-based Archived 2024-03-01 → 2024-05-31
MCL Health-based Archived 2024-01-01 → 2024-03-31
MCL Health-based Archived 2023-10-01 → 2023-12-31
MCL Health-based Archived 2023-07-01 → 2023-09-30
MCL Health-based Archived 2023-04-01 → 2023-06-30
MCL Health-based Resolved 2018-01-01 → 2018-03-31
MCL Health-based Resolved 2018-01-01 → 2018-03-31
MCL Health-based Resolved 2017-04-01 → 2017-06-30
MCL Health-based Resolved 2017-04-01 → 2017-06-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
13700 µg/L 137%
of the EPA limit, in the worst sample — 10000 µg/L
 26/26 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 4/4 LCR 2024
Combined Uranium
1.38421 µg/L 4.6%
of the EPA limit 30 µg/L
 1/1 SYR4 2015
11 contaminants tested, none detected
1,2-DIBROMO-3-CHLOROPROPANE2,4,5-TP2,4-DAtrazineDalaponDinosebEthylene DibromideLassoPentachlorophenolPicloramSimazine

Utility contact

Contact
CALDWELL, LOUIS AL
Phone
619-988-5805
Email
lacald@usgs.gov

Frequently asked questions about Willowside Terrace Water Association

Is Willowside Terrace Water Association tap water safe to drink?

EPA monitoring detected 3 contaminants in Willowside Terrace Water Association's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Willowside Terrace Water Association's water?

EPA monitoring detected Nitrate, Lead, Combined Uranium. The full list with the level and data source for each is above.

How many people does Willowside Terrace Water Association serve?

Willowside Terrace Water Association reports serving 100 people in California, per its EPA record.

Has Willowside Terrace Water Association had any water quality violations?

The EPA has 71 violations on file for Willowside Terrace Water Association, of which 47 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.