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Tap water quality report

Weaverville, CA

EPA monitoring detected 9 contaminants across the 2 water suppliers serving Weaverville. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
4,077
people served
9
contaminants found
California rankings Lead in California PFAS in California

What was found in Weaverville's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
460 µg/L 4.6%
of the EPA limit 10000 µg/L
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2019
1/2 SYR4
Chloroform
18.435 µg/L
No EPA limit set
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2019
Highest in the city: 31.2 µg/L — RUSH CREEK MUTUAL WATER SYSTEM · 102 people · 2019
2/2 SYR4
TTHM
18.435 µg/L 23%
of the EPA limit 80 µg/L
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2019
Highest in the city: 31.2 µg/L — RUSH CREEK MUTUAL WATER SYSTEM · 102 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
19.725 µg/L 33%
of the EPA limit 60 µg/L
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2019
Highest in the city: 25.8 µg/L — RUSH CREEK MUTUAL WATER SYSTEM · 102 people · 2019
2/2 SYR4
Dichloroacetic Acid
7.71 µg/L
No EPA limit set
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2019
Highest in the city: 13.8 µg/L — RUSH CREEK MUTUAL WATER SYSTEM · 102 people · 2019
2/2 SYR4
Trichloroacetic Acid
11.966 µg/L
No EPA limit set
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2019
Highest in the city: 12 µg/L — RUSH CREEK MUTUAL WATER SYSTEM · 102 people · 2019
2/2 SYR4
PFOS
0.0190 µg/L
No EPA limit set
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2024
1/2 UCMR-5
Lead
0.0117 mg/L 78%
of the EPA limit 0.0150 mg/L
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2023
2/2 LCR
PFHXS
0.0056 µg/L
No EPA limit set
Main supplier: WEAVERVILLE C.S.D. · 3,975 people · 2024
1/2 UCMR-5
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Weaverville

SupplierPopulation served
WEAVERVILLE C.S.D. 3,975
RUSH CREEK MUTUAL WATER SYSTEM 102

Frequently asked questions about Weaverville tap water

Is Weaverville tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Weaverville. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Weaverville?

2 public water suppliers report drinking-water monitoring for Weaverville, California to the EPA. Each is listed above with its population served.

What contaminants are in Weaverville's water?

The contaminants EPA monitoring detected in Weaverville include Nitrate, Chloroform, TTHM, Total Haloacetic Acids (HAA5), Dichloroacetic Acid. The full list, with the level at the main supplier and the data source, is in the table above.

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.