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Tap water quality report

Md 58 Sierra Highlands

EPA monitoring tested this supplier for 39 contaminants and detected 5. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

39
contaminants tested
5
detected
75
people served
10
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Madera

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.

10
health-based violations
18
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2012-01-01
TT Health-based Resolved 2012-01-01
MCL Health-based Resolved 2009-08-01 → 2009-08-31
MCL Health-based Resolved 2009-08-01 → 2009-08-31
MCL Health-based Resolved 2009-08-01 → 2009-08-31
MCL Health-based Resolved 2009-07-01 → 2009-07-31
MCL Health-based Resolved 2009-07-01 → 2009-07-31
MCL Health-based Resolved 2009-07-01 → 2009-07-31
MCL Health-based Resolved 2006-09-01 → 2006-09-30
MCL Health-based Resolved 2006-09-01 → 2006-09-30

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
 6/6 LCR 2023
Combined Uranium
5.99949 µg/L 20%
of the EPA limit 30 µg/L
worst single sample: 6 µg/L
2/2 SYR4 2012
Arsenic
1.7 µg/L 17%
of the EPA limit 10 µg/L
 1/1 SYR4 2017
Chromium
3.1 µg/L 3.1%
of the EPA limit 100 µg/L
 1/1 SYR4 2017
Fluoride
450 µg/L 11%
of the EPA limit 4000 µg/L
 1/1 SYR4 2017
34 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalAsbestosBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideDichloromethaneEthylbenzeneLeadMercuryNitrateNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BROWN, CHAD
Phone
559-675-7820
Email
chad.brown@maderacounty.com

Frequently asked questions about Md 58 Sierra Highlands

Is Md 58 Sierra Highlands tap water safe to drink?

EPA monitoring detected 5 contaminants in Md 58 Sierra Highlands'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 Md 58 Sierra Highlands's water?

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

How many people does Md 58 Sierra Highlands serve?

Md 58 Sierra Highlands reports serving 75 people in California, per its EPA record.

Has Md 58 Sierra Highlands had any water quality violations?

The EPA has 18 violations on file for Md 58 Sierra Highlands, of which 10 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.