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Tap water quality report

San Cayetano Mutual Water Co

EPA monitoring tested this supplier for 74 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
10
detected
43
people served
2
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Ventura

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.

2
health-based violations
12
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1996-09-01 → 1996-09-30
MCL Health-based Resolved 1996-09-01 → 1996-09-30
MON Monitoring Resolved 2016-08-01 → 2016-08-31
MON Monitoring Resolved 2016-08-01 → 2016-08-31
MR Monitoring Resolved 2006-06-01 → 2006-06-30
MR Monitoring Resolved 2006-06-01 → 2006-06-30
MR Monitoring Resolved 2004-01-01 → 2004-12-31
MR Monitoring Resolved 2004-01-01 → 2004-12-31
MR Monitoring Resolved 1999-10-01
MR Monitoring Resolved 1999-10-01

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
Nitrate
7734.85 µg/L 77%
of the EPA limit 10000 µg/L
worst single sample: 8972.2 µg/L
72/72 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 20/20 LCR 2024
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
 10/10 SYR4 2012–2019
Combined Uranium
9.22906 µg/L 31%
of the EPA limit 30 µg/L
worst single sample: 9.3125 µg/L
8/8 SYR4 2013–2019
Selenium
6.65 µg/L 13%
of the EPA limit 50 µg/L
worst single sample: 7 µg/L
8/10 SYR4 2012–2019
Barium
22.875 µg/L 1.1%
of the EPA limit 2000 µg/L
worst single sample: 24.5 µg/L
6/10 SYR4 2012–2019
Nitrate-Nitrite
2240 µg/L 22%
of the EPA limit 10000 µg/L
worst single sample: 2300 µg/L
5/5 SYR4 2016–2019
Chromium
2.85 µg/L 2.9%
of the EPA limit 100 µg/L
worst single sample: 3 µg/L
4/10 SYR4 2012–2019
Cadmium
0.2000 µg/L 4%
of the EPA limit 5 µg/L
 1/10 SYR4 2012–2019
Lead
0.7000 µg/L 4.7%
of the EPA limit 15 µg/L
 1/10 SYR4 2012–2019
64 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BALL, GARY
Phone
805-524-1030
Email
[email protected]

Frequently asked questions about San Cayetano Mutual Water Co

Is San Cayetano Mutual Water Co tap water safe to drink?

EPA monitoring detected 10 contaminants in San Cayetano Mutual Water Co'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 San Cayetano Mutual Water Co's water?

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

How many people does San Cayetano Mutual Water Co serve?

San Cayetano Mutual Water Co reports serving 43 people in California, per its EPA record.

Has San Cayetano Mutual Water Co had any water quality violations?

The EPA has 12 violations on file for San Cayetano Mutual Water Co, of which 2 are health-based (a contaminant limit or required treatment was breached) and 0 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.