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Mcmahon Road Mutual Water Company

EPA monitoring tested this supplier for 64 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

64
contaminants tested
8
detected
102
people served
16
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
San Benito

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.

16
health-based violations
37
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2000-11-01 → 2000-11-30
MCL Health-based Resolved 2000-11-01 → 2000-11-30
MCL Health-based Resolved 2000-10-01 → 2000-10-31
MCL Health-based Resolved 2000-10-01 → 2000-10-31
MCL Health-based Resolved 1999-12-01 → 1999-12-31
MCL Health-based Resolved 1999-12-01 → 1999-12-31
MCL Health-based Resolved 1995-10-01 → 1995-10-31
MCL Health-based Resolved 1995-10-01 → 1995-10-31
MCL Health-based Resolved 1995-10-01 → 1995-10-31
MCL Health-based Resolved 1995-10-01 → 1995-10-31

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 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
8800 µg/L 88%
of the EPA limit 10000 µg/L
 26/28 SYR4 2012–2019
Lead
0.0029 mg/L 19%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Arsenic
4.3 µg/L 43%
of the EPA limit 10 µg/L
 2/2 SYR4 2014–2017
Bromoform
1.5 µg/L
No EPA limit set
 2/2 SYR4 2014–2017
Fluoride
460 µg/L 12%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2017
TTHM
1.8 µg/L 2.3%
of the EPA limit 80 µg/L
 2/2 SYR4 2014–2017
Dibromoacetic Acid
1.1 µg/L
No EPA limit set
 1/2 SYR4 2014–2017
Nitrate-Nitrite
410 µg/L 4.1%
of the EPA limit 10000 µg/L
 1/1 SYR4 2017
56 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylbenzeneLassoLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
STANTON, DAVE
Phone
831-630-1258
Email
Dstanton5015@gmail.com

Frequently asked questions about Mcmahon Road Mutual Water Company

Is Mcmahon Road Mutual Water Company tap water safe to drink?

EPA monitoring detected 8 contaminants in Mcmahon Road Mutual Water Company'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 Mcmahon Road Mutual Water Company's water?

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

How many people does Mcmahon Road Mutual Water Company serve?

Mcmahon Road Mutual Water Company reports serving 102 people in California, per its EPA record.

Has Mcmahon Road Mutual Water Company had any water quality violations?

The EPA has 37 violations on file for Mcmahon Road Mutual Water Company, of which 16 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.