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Tap water quality report

Granite Falls, WA

EPA monitoring detected 11 contaminants across the 1 water supplier serving Granite Falls. 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.

1
water supplier
5,349
people served
11
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Granite Falls'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
TTHM
51.44 µg/L 64%
of the EPA limit 80 µg/L
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Chloroform
48.8 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
32.425 µg/L 54%
of the EPA limit 60 µg/L
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Trichloroacetic Acid
19.86 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Dichloroacetic Acid
13.12 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Bromodichloromethane
5.515 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Monochloroacetic Acid
2.636 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Dibromochloromethane
2.5 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.2 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Bromoform
0.5000 µg/L
No EPA limit set
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2019
1/1 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: GRANITE FALLS CITY OF · 5,349 people · 2024
1/1 LCR
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 Granite Falls

SupplierPopulation served
GRANITE FALLS CITY OF 5,349

Frequently asked questions about Granite Falls tap water

Is Granite Falls tap water safe to drink?

EPA testing detected 11 contaminants in the water serving Granite Falls. 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 Granite Falls?

1 public water supplier report drinking-water monitoring for Granite Falls, Washington to the EPA. Each is listed above with its population served.

What contaminants are in Granite Falls's water?

The contaminants EPA monitoring detected in Granite Falls include TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, 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.