Tap WaterIndex

← California

Tap water quality report

Cdcr - Sierra Conservation Center

EPA monitoring tested this supplier for 59 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

59
contaminants tested
13
detected
3,571
people served
26
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Surface water
Ownership
State government
Counties served
Tuolumne

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.

26
health-based violations
28
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2019-01-01 → 2019-03-31
MCL Health-based Resolved 2019-01-01 → 2019-03-31
MCL Health-based Resolved 2018-10-01 → 2018-12-31
MCL Health-based Resolved 2018-10-01 → 2018-12-31
MCL Health-based Resolved 2018-07-01 → 2018-09-30
MCL Health-based Resolved 2018-07-01 → 2018-09-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
TT Health-based Resolved 2009-04-01 → 2009-06-30
TT Health-based Resolved 2009-04-01 → 2009-06-30

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 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
Bromodichloromethane
4.745 µg/L
No EPA limit set
worst single sample: 6.5 µg/L
92/96 SYR4 2012–2019
Chloroform
77.135 µg/L
No EPA limit set
worst single sample: 90.7 µg/L
92/96 SYR4 2012–2019
TTHM
80.085 µg/L 100%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 97.5 µg/L
92/96 SYR4 2012–2019
Trichloroacetic Acid
45.55 µg/L
No EPA limit set
worst single sample: 57.4 µg/L
90/94 SYR4 2014–2019
Dichloroacetic Acid
27.66 µg/L
No EPA limit set
worst single sample: 36.1 µg/L
89/94 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
73.515 µg/L 123%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 83.6 µg/L
88/94 SYR4 2014–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 45/45 LCR 2024
Nitrate
150 µg/L 1.5%
of the EPA limit 10000 µg/L
 8/16 SYR4 2012–2019
Monochloroacetic Acid
2.664 µg/L
No EPA limit set
worst single sample: 2.67 µg/L
7/94 SYR4 2014–2019
Copper
6.7 µg/L 0.5%
of the EPA limit 1300 µg/L
worst single sample: 7.1 µg/L
6/9 SYR4 2012–2019
Barium
14.86 µg/L 0.7%
of the EPA limit 2000 µg/L
worst single sample: 14.9 µg/L
5/8 SYR4 2012–2019
Nitrate-Nitrite
144015 µg/L 1440%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 160000 µg/L
3/4 SYR4 2014–2017
Dibromoacetic Acid
3.105 µg/L
No EPA limit set
worst single sample: 3.2 µg/L
2/93 SYR4 2014–2019
46 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicAsbestosAtrazineBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneEthylene DibromideEthylbenzeneFluorideHexachlorobenzeneHexachlorocyclopentadieneLassoLeadMercuryMonobromoacetic AcidNitriteSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BUCHANAN, KEVIN
Phone
209-984-5291
Email
Kevin.buchanan@cdcr.ca.gov

Frequently asked questions about Cdcr - Sierra Conservation Center

Is Cdcr - Sierra Conservation Center tap water safe to drink?

EPA monitoring detected 13 contaminants in Cdcr - Sierra Conservation Center'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 Cdcr - Sierra Conservation Center's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Trichloroacetic Acid, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Cdcr - Sierra Conservation Center serve?

Cdcr - Sierra Conservation Center reports serving 3,571 people in California, per its EPA record.

Has Cdcr - Sierra Conservation Center had any water quality violations?

The EPA has 28 violations on file for Cdcr - Sierra Conservation Center, of which 26 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.