What was found in Rathdrum'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 | 1750 µg/L 18% of the EPA limit 10000 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 4090 µg/L — RIMROCK SERVICE AREA · 3,493 people · 2019 | 24/25 | SYR4 |
| Nitrate-Nitrite | 1404 µg/L 14% of the EPA limit 10000 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 2810 µg/L — HOYT BLUFF WATER ASSOCIATION · 151 people · 2016 | 22/25 | SYR4 |
| Fluoride | 350 µg/L 8.8% of the EPA limit 4000 µg/L Highest in the city: HOYT BLUFF WATER ASSOCIATION · 151 people · 2019 | 3/25 | SYR4 |
| Barium | 25.7 µg/L 1.3% of the EPA limit 2000 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 66 µg/L — OHIO MATCH ESTATES · 118 people · 2019 | 16/25 | SYR4 |
| TTHM | 1.65 µg/L 2.1% of the EPA limit 80 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 34.15 µg/L — HAYDEN HAVEN / GEM SHORES · 236 people · 2019 | 12/25 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.44 µg/L 44% of the EPA limit 60 µg/L Highest in the city: HAYDEN HAVEN / GEM SHORES · 236 people · 2019 | 3/25 | SYR4 |
| Copper | 13.4 µg/L 1% of the EPA limit 1300 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019 | 1/25 | SYR4 |
| Combined Uranium | 1.8 µg/L 6% of the EPA limit 30 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 10.2055 µg/L — RIMROCK SERVICE AREA · 3,493 people · 2015 | 19/25 | SYR4 |
| Arsenic | 2.358 µg/L 24% of the EPA limit 10 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 6.972 µg/L — MOUNTAIN VIEW TERRACE · 445 people · 2019 | 17/25 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.5740 pCi/L 3.8% of the EPA limit 15 pCi/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 4.984 pCi/L — RIMROCK SERVICE AREA · 3,493 people · 2015 | 19/25 | SYR4 |
| Combined Radium (-226 And -228) | 0.6882 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019
Highest in the city: 3.2653 pCi/L — VALLEY GREEN · 135 people · 2019 | 17/25 | SYR4 |
| Toluene | 2.84 µg/L 0.3% of the EPA limit 1000 µg/L Highest in the city: PANHANDLE VILLAGE WATER SYSTEM · 105 people · 2019 | 2/25 | SYR4 |
| Lead | 2.47 µg/L 16% of the EPA limit 15 µg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2019 | 2/25 | SYR4 |
| Tetrachloroethylene | 0.5400 µg/L 11% of the EPA limit 5 µg/L Highest in the city: SEASONS ROAD WATER ASSN · 50 people · 2016 | 1/25 | SYR4 |
| Picloram | 0.1250 µg/L 0% of the EPA limit 500 µg/L Highest in the city: HOYT BLUFF WATER ASSOCIATION · 151 people · 2019 | 1/25 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: RATHDRUM CITY OF · 10,358 people · 2026
Highest in the city: 0.0100 mg/L — UPPER TWIN LAKES WATER COMPANY INC · 227 people · 2026 | 25/25 | LCR |
| Pfpea | 0.0080 µg/L No EPA limit set Main supplier: RATHDRUM CITY OF · 10,358 people · 2024 | 1/25 | UCMR-5 |
| Pfhxa | 0.0042 µg/L No EPA limit set Main supplier: RATHDRUM CITY OF · 10,358 people · 2024 | 1/25 | 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 Rathdrum
| Supplier | Population served |
|---|---|
| RATHDRUM CITY OF | 10,358 |
| HILLSIDE SERVICE AREA | 4,140 |
| RIMROCK SERVICE AREA | 3,493 |
| TWIN LAKES SERVICE AREA | 2,023 |
| HAYDEN PINES GROUSE MEADOWS | 1,188 |
| CHILCO SERVICE AREA | 563 |
| MOUNTAIN VIEW TERRACE | 445 |
| ELKHORN RANCH | 278 |
| HAYDEN HAVEN / GEM SHORES | 236 |
| UPPER TWIN LAKES WATER COMPANY INC | 227 |
| PANHANDLE MOBILE ESTATES | 168 |
| ATLAS ACRES | 160 |
| HOYT BLUFF WATER ASSOCIATION | 151 |
| VALLEY GREEN | 135 |
| HAYDEN ORCHARDS WATER SYSTEM | 122 |
| OHIO MATCH ESTATES | 118 |
| PANHANDLE VILLAGE WATER SYSTEM | 105 |
| LAKE FOREST HOMES ASSN INC | 98 |
| DRY ACRES WATER AND SEWER DIST | 75 |
| MEADOWLAND ACRES | 63 |
| EAST SEASONS ACRES | 63 |
| SEASONS ROAD WATER ASSN | 50 |
| RANCH VALLEY WATER ASSN | 45 |
| SINGER RANCH WATER SYSTEM | 44 |
| ASHLEY ESTATES WATER ASSN | 38 |
Frequently asked questions about Rathdrum tap water
Is Rathdrum tap water safe to drink?
EPA testing detected 18 contaminants in the water serving Rathdrum. 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 Rathdrum?
25 public water suppliers report drinking-water monitoring for Rathdrum, Idaho to the EPA. Each is listed above with its population served.
What contaminants are in Rathdrum's water?
The contaminants EPA monitoring detected in Rathdrum include Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.