What was found in Idaho Falls's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 4710 µg/L 47% of the EPA limit 10000 µg/L | 23/23 | SYR4 |
| Nitrate-Nitrite | 4650 µg/L 47% of the EPA limit 10000 µg/L | 22/23 | SYR4 |
| Fluoride | 900 µg/L 23% of the EPA limit 4000 µg/L | 22/23 | SYR4 |
| Dibromochloromethane | 760 µg/L No EPA limit set | 1/23 | SYR4 |
| Barium | 278 µg/L 14% of the EPA limit 2000 µg/L | 22/23 | SYR4 |
| Nitrite | 140 µg/L 14% of the EPA limit 1000 µg/L | 4/23 | SYR4 |
| Lithium | 57.4 µg/L No EPA limit set | 2/23 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 17 pCi/L 113% of the EPA limit, in the worst sample — 15 pCi/L | 18/23 | SYR4 |
| TTHM | 8.6 µg/L 11% of the EPA limit 80 µg/L | 2/23 | SYR4 |
| Copper | 7 µg/L 0.5% of the EPA limit 1300 µg/L | 2/23 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.8 µg/L 11% of the EPA limit 60 µg/L | 2/23 | SYR4 |
| Combined Uranium | 6.4 µg/L 21% of the EPA limit 30 µg/L | 22/23 | SYR4 |
| Toluene | 5.65 µg/L 0.6% of the EPA limit 1000 µg/L | 2/23 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L | 22/23 | SYR4 |
| Bromoform | 3.11 µg/L No EPA limit set | 1/23 | SYR4 |
| Combined Radium (-226 And -228) | 3.1 pCi/L 62% of the EPA limit 5 pCi/L | 18/23 | SYR4 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L | 10/23 | SYR4 |
| Selenium | 3 µg/L 6% of the EPA limit 50 µg/L | 15/23 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.74 µg/L 29% of the EPA limit 6 µg/L | 3/23 | SYR4 |
| Xylenes, Total | 1.23 µg/L 0% of the EPA limit 10000 µg/L | 1/23 | SYR4 |
| Dibromoacetic Acid | 1.22 µg/L No EPA limit set | 1/23 | SYR4 |
| Bromodichloromethane | 1.08 µg/L No EPA limit set | 1/23 | SYR4 |
| Gross Beta Particle Activity | 0.5700 pCi/L No EPA limit set | 1/23 | SYR4 |
| Chloroform | 0.5500 µg/L No EPA limit set | 1/23 | SYR4 |
| Lead | 0.0130 mg/L 87% of the EPA limit 0.0150 mg/L | 23/23 | LCR |
Water suppliers serving Idaho Falls
| Supplier | Population served |
|---|---|
| IDAHO FALLS CITY OF | 69,450 |
| FALLS WATER COMPANY INC | 22,650 |
| COMORE LOMA | 1,500 |
| TAYLOR MOUNTAIN WATER AND SEWER DISTRICT | 600 |
| J AND K WATER CORP | 370 |
| BLACKHAWK ESTATES/IRON RIM | 270 |
| COUNTRY LIFE ESTATES | 250 |
| BONNEVILLE ACRES WATER USERS ASSN INC | 100 |
| MILLER COUNTRY ESTATES | 83 |
| FALCON RIDGE SUBDIVISION | 75 |
| HIGHWAY ESTATES WATER ASSN | 65 |
| LAZY EIGHT ESTATES | 60 |
| NUR WATER ASSN | 60 |
| WOODLAND HEIGHTS WATER ASSN #1 | 54 |
| TOWNSHIP PARK WATER COMPANY | 43 |
| COTTONWOOD ACRES DIV 4 | 43 |
| WESTWOOD WATER ASSN | 41 |
| RANCHO VIA WELL USERS ASSN INC | 40 |
| KAREY LANE WELL INC | 38 |
| DJ PARK WELL | 35 |
| BROOKHAVEN WATER ASSN | 33 |
| SOHNS MOBILE HOME PARK INC | 32 |
| NORTHSIDE ESTATES WELL | 30 |
Frequently asked questions about Idaho Falls tap water
Is Idaho Falls tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Idaho 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 Idaho Falls?
23 public water suppliers report drinking-water monitoring for Idaho Falls, Idaho to the EPA. Each is listed above with its population served.
What contaminants are in Idaho Falls's water?
The contaminants EPA monitoring detected in Idaho Falls include Nitrate, Nitrate-Nitrite, Fluoride, Dibromochloromethane, Barium. The full list, with the highest level found 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.