Tap WaterIndex

← California

Tap water quality report

Guatay Mutual Benefit Corporation

EPA monitoring tested this supplier for 66 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
10
detected
100
people served
64
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.

64
health-based violations
107
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2024-07-01 → 2024-09-30
MCL Health-based Archived 2023-10-01 → 2023-12-31
MCL Health-based Archived 2023-10-01 → 2023-12-31
MCL Health-based Archived 2023-07-01 → 2023-09-30
MCL Health-based Archived 2023-07-01 → 2023-09-30
MCL Health-based Archived 2023-01-01 → 2023-03-31
MCL Health-based Archived 2023-01-01 → 2023-03-31
MCL Health-based Archived 2023-01-01 → 2023-03-31
MCL Health-based Archived 2022-10-01 → 2022-12-31
MCL Health-based Archived 2022-10-01 → 2022-12-31

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Combined Uranium
129.779 µg/L 433%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
worst single sample: 140.358 µg/L
52/52 SYR4 2012–2019
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
 9/12 SYR4 2012–2019
Lead
0.0350 mg/L 233%
above the EPA limit of 0.0150 mg/L
 4/4 LCR 2024
Nitrate
4900 µg/L 49%
of the EPA limit 10000 µg/L
 4/30 SYR4 2012–2019
Selenium
9.1 µg/L 18%
of the EPA limit 50 µg/L
worst single sample: 10 µg/L
3/7 SYR4 2013–2019
Barium
3.94 µg/L 0.2%
of the EPA limit 2000 µg/L
worst single sample: 4.1 µg/L
2/7 SYR4 2013–2019
Chromium
10.95 µg/L 11%
of the EPA limit 100 µg/L
worst single sample: 11 µg/L
2/7 SYR4 2013–2019
Lead
1.46 µg/L 9.7%
of the EPA limit 15 µg/L
worst single sample: 1.5 µg/L
2/7 SYR4 2013–2019
Nitrate-Nitrite
4900 µg/L 49%
of the EPA limit 10000 µg/L
 1/7 SYR4 2012–2019
Toluene
21 µg/L 2.1%
of the EPA limit 1000 µg/L
 1/7 SYR4 2012–2019
56 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
RICHARDSON, SARA
Phone
619-627-9526
Email
[email protected]

Frequently asked questions about Guatay Mutual Benefit Corporation

Is Guatay Mutual Benefit Corporation tap water safe to drink?

EPA monitoring detected 10 contaminants in Guatay Mutual Benefit Corporation'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 Guatay Mutual Benefit Corporation's water?

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

How many people does Guatay Mutual Benefit Corporation serve?

Guatay Mutual Benefit Corporation reports serving 100 people in California, per its EPA record.

Has Guatay Mutual Benefit Corporation had any water quality violations?

The EPA has 107 violations on file for Guatay Mutual Benefit Corporation, of which 64 are health-based (a contaminant limit or required treatment was breached) and 1 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.