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Tap water quality report

Lake Forest Park, WA

EPA monitoring detected 9 contaminants across the 4 water suppliers serving Lake Forest Park. 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.

4
water suppliers
3,477
people served
9
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Lake Forest Park'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
2620 µg/L 26%
of the EPA limit 10000 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
3/4 SYR4
Nitrate-Nitrite
2309 µg/L 23%
of the EPA limit 10000 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
3/4 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
1/4 SYR4
Barium
10 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
1/4 SYR4
Copper
5 µg/L 0.4%
of the EPA limit 1300 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
1/4 SYR4
Arsenic
3.9 µg/L 39%
of the EPA limit 10 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
2/4 SYR4
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2019
1/4 SYR4
Gross Beta Particle Activity
1.7455 pCi/L
No EPA limit set
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2015
1/4 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LAKE FOREST PARK WATER DISTRICT · 3,171 people · 2023
Highest in the city: 0.0015 mg/L — FOUR LAKES · 212 people · 2024
4/4 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 Lake Forest Park

SupplierPopulation served
LAKE FOREST PARK WATER DISTRICT 3,171
FOUR LAKES 212
MAPLE VISTA 57
NOBLE WOODS WATER SYSTEM 37

Frequently asked questions about Lake Forest Park tap water

Is Lake Forest Park tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Lake Forest Park. 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 Lake Forest Park?

4 public water suppliers report drinking-water monitoring for Lake Forest Park, Washington to the EPA. Each is listed above with its population served.

What contaminants are in Lake Forest Park's water?

The contaminants EPA monitoring detected in Lake Forest Park include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper. 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.