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Mountain Springs Mutual Water Company

EPA monitoring tested this supplier for 78 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

78
contaminants tested
18
detected
40
people served
2
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Private
Counties served
Santa Clara

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
35
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2003-01-01 → 2003-01-31
MCL Health-based Resolved 2003-01-01 → 2003-01-31
MON Monitoring Resolved 2017-12-01 → 2017-12-31
MON Monitoring Resolved 2017-12-01 → 2017-12-31
MR Monitoring Resolved 2015-04-01 → 2015-04-30
MR Monitoring Resolved 2015-04-01 → 2015-04-30
MR Monitoring Resolved 2015-04-01 → 2015-04-30
MR Monitoring Resolved 2015-04-01 → 2015-04-30
MR Monitoring Resolved 2002-09-01 → 2002-09-30
MR Monitoring Resolved 2002-09-01 → 2002-09-30

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 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
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 26/26 LCR 2025
Nitrate
750 µg/L 7.5%
of the EPA limit 10000 µg/L
 14/18 SYR4 2013–2019
Fluoride
502.5 µg/L 13%
of the EPA limit 4000 µg/L
worst single sample: 540 µg/L
4/4 SYR4 2013–2018
Barium
65.1 µg/L 3.3%
of the EPA limit 2000 µg/L
worst single sample: 68 µg/L
3/4 SYR4 2013–2018
Bromodichloromethane
8.93 µg/L
No EPA limit set
worst single sample: 9.5 µg/L
3/3 SYR4 2017–2019
Chloroform
23.78 µg/L
No EPA limit set
worst single sample: 26 µg/L
3/3 SYR4 2017–2019
Dibromochloromethane
5.63 µg/L
No EPA limit set
worst single sample: 6 µg/L
3/3 SYR4 2017–2019
TTHM
35.9 µg/L 45%
of the EPA limit 80 µg/L
worst single sample: 38 µg/L
3/3 SYR4 2017–2019
Total Haloacetic Acids (HAA5)
5.52 µg/L 9.2%
of the EPA limit 60 µg/L
worst single sample: 5.7 µg/L
3/3 SYR4 2017–2019
Bromoform
4.75 µg/L
No EPA limit set
worst single sample: 4.9 µg/L
2/3 SYR4 2017–2019
Copper
183.8 µg/L 14%
of the EPA limit 1300 µg/L
worst single sample: 190 µg/L
2/4 SYR4 2013–2018
Chromium
0.9025 µg/L 0.9%
of the EPA limit 100 µg/L
worst single sample: 0.9200 µg/L
2/4 SYR4 2013–2018
Dichloroacetic Acid
3.825 µg/L
No EPA limit set
worst single sample: 3.9 µg/L
2/3 SYR4 2017–2019
Lead
61.81 µg/L 412%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 65 µg/L
2/3 SYR4 2015–2018
Nitrate-Nitrite
304021 µg/L 3040%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 320000 µg/L
2/4 SYR4 2013–2018
Trichloroacetic Acid
1.785 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
2/3 SYR4 2017–2019
Dibromoacetic Acid
2.9 µg/L
No EPA limit set
 1/3 SYR4 2017–2019
Selenium
0.7800 µg/L 1.6%
of the EPA limit 50 µg/L
 1/4 SYR4 2013–2018
60 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PHILLIPS, ERIK
Phone
970-319-6538
Email
mountainspringstreasurer@gmail.com

Frequently asked questions about Mountain Springs Mutual Water Company

Is Mountain Springs Mutual Water Company tap water safe to drink?

EPA monitoring detected 18 contaminants in Mountain Springs 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 Mountain Springs Mutual Water Company's water?

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

How many people does Mountain Springs Mutual Water Company serve?

Mountain Springs Mutual Water Company reports serving 40 people in California, per its EPA record.

Has Mountain Springs Mutual Water Company had any water quality violations?

The EPA has 35 violations on file for Mountain Springs Mutual Water Company, 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.