What was found in Loon Lake'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 1957 µg/L 20% of the EPA limit 10000 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 8420 µg/L — STEVENS CO PUD - ECHO ESTATES · 75 people · 2019 | 13/14 | SYR4 |
| Nitrate-Nitrite | 1870 µg/L 19% of the EPA limit 10000 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 2673.45 µg/L — STEVENS CO PUD - JUMP OFF JOE · 204 people · 2012 | 13/14 | SYR4 |
| Fluoride | 207 µg/L 5.2% of the EPA limit 4000 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 284.1 µg/L — STEVENS CO PUD - MISSION RIDGE · 120 people · 2019 | 8/14 | SYR4 |
| Barium | 158.35 µg/L 7.9% of the EPA limit 2000 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 255 µg/L — LOON LAKE ACRES · 111 people · 2016 | 14/14 | SYR4 |
| Copper | 46.3465 µg/L 3.6% of the EPA limit 1300 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 133 µg/L — SOLAR PINES WATER ASSN · 36 people · 2019 | 8/14 | SYR4 |
| Lead | 1.39 µg/L 9.3% of the EPA limit 15 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 40.1 µg/L — SOLAR PINES WATER ASSN · 36 people · 2019 | 4/14 | SYR4 |
| Arsenic | 14.86 µg/L 149% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 20.1 µg/L — STEVENS CO PUD - MISSION RIDGE · 120 people · 2019 | 5/14 | SYR4 |
| Lithium | 13.2 µg/L No EPA limit set Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2024 | 1/14 | UCMR-5 |
| Cyanide | 11.5 µg/L 5.8% of the EPA limit 200 µg/L Highest in the city: TIGER TRACTS · 90 people · 2012 | 1/14 | SYR4 |
| Toluene | 11.1 µg/L 1.1% of the EPA limit 1000 µg/L Highest in the city: STEVENS CO PUD - ECHO ESTATES · 75 people · 2018 | 1/14 | SYR4 |
| Selenium | 10.4 µg/L 21% of the EPA limit 50 µg/L Highest in the city: STEVENS CO PUD - ECHO ESTATES · 75 people · 2019 | 3/14 | SYR4 |
| Combined Uranium | 8 µg/L 27% of the EPA limit 30 µg/L Highest in the city: STEVENS CO PUD - MISSION RIDGE · 120 people · 2012 | 1/14 | SYR4 |
| TTHM | 5.13 µg/L 6.4% of the EPA limit 80 µg/L Highest in the city: STEVENS CO PUD - DEER LAKE · 2,884 people · 2017 | 10/14 | SYR4 |
| Antimony, Total | 2.65 µg/L 44% of the EPA limit 6 µg/L Highest in the city: STEVENS CO PUD - MISSION RIDGE · 120 people · 2019 | 2/14 | SYR4 |
| Chloroform | 2.134 µg/L No EPA limit set Highest in the city: STEVENS CO PUD - ADDY · 253 people · 2019 | 8/14 | SYR4 |
| Chromium | 1.54 µg/L 1.5% of the EPA limit 100 µg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2019
Highest in the city: 2.1 µg/L — STEVENS CO PUD - WAITTS LAKE · 1,216 people · 2012 | 4/14 | SYR4 |
| Bromodichloromethane | 1.974 µg/L No EPA limit set Highest in the city: STEVENS CO PUD - DEER LAKE · 2,884 people · 2019 | 8/14 | SYR4 |
| Dibromochloromethane | 1.89 µg/L No EPA limit set Highest in the city: STEVENS CO PUD - WAITTS LAKE · 1,216 people · 2019 | 9/14 | SYR4 |
| Dichloroacetic Acid | 1.3885 µg/L No EPA limit set Highest in the city: STEVENS CO PUD - DEER LAKE · 2,884 people · 2019 | 2/14 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.3885 µg/L 2.3% of the EPA limit 60 µg/L Highest in the city: STEVENS CO PUD - DEER LAKE · 2,884 people · 2018 | 2/14 | SYR4 |
| Cadmium | 1.28 µg/L 26% of the EPA limit 5 µg/L Highest in the city: STEVENS CO PUD - MISSION RIDGE · 120 people · 2019 | 1/14 | SYR4 |
| Bromoform | 1.0895 µg/L No EPA limit set Highest in the city: STEVENS CO PUD - WAITTS LAKE · 1,216 people · 2019 | 5/14 | SYR4 |
| Combined Radium (-226 And -228) | 1 pCi/L 20% of the EPA limit 5 pCi/L Highest in the city: STEVENS CO PUD - ECHO ESTATES · 75 people · 2012 | 2/14 | SYR4 |
| Trichloroethylene | 0.5800 µg/L 12% of the EPA limit 5 µg/L Highest in the city: STEVENS CO PUD - ECHO ESTATES · 75 people · 2018 | 1/14 | SYR4 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2025
Highest in the city: 0.0047 mg/L — STEVENS CO PUD - JUMP OFF JOE · 204 people · 2025 | 14/14 | LCR |
| Pfhxa | 0.0044 µg/L No EPA limit set Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2023 | 1/14 | UCMR-5 |
| Pfpea | 0.0034 µg/L No EPA limit set Main supplier: STEVENS CO PUD - SUNCREST · 7,484 people · 2023 | 1/14 | 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 Loon Lake
| Supplier | Population served |
|---|---|
| STEVENS CO PUD - SUNCREST | 7,484 |
| STEVENS CO PUD - DEER LAKE | 2,884 |
| STEVENS CO PUD - LOON LAKE | 2,487 |
| STEVENS CO PUD - WAITTS LAKE | 1,216 |
| STEVENS CO PUD - CLAYTON | 725 |
| STEVENS CO PUD - VALLEY | 550 |
| STEVENS CO PUD - ADDY | 253 |
| STEVENS CO PUD - JUMP OFF JOE | 204 |
| STEVENS CO PUD - MISSION RIDGE | 120 |
| LOON LAKE ACRES | 111 |
| TIGER TRACTS | 90 |
| STEVENS CO PUD - ECHO ESTATES | 75 |
| STEVENS CO PUD - DOLOMITE | 60 |
| SOLAR PINES WATER ASSN | 36 |
Frequently asked questions about Loon Lake tap water
Is Loon Lake tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Loon Lake. 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 Loon Lake?
14 public water suppliers report drinking-water monitoring for Loon Lake, Washington to the EPA. Each is listed above with its population served.
What contaminants are in Loon Lake's water?
The contaminants EPA monitoring detected in Loon Lake 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.