What was found in ZIP 83401
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 2520 µg/L 25% of the EPA limit 10000 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2018
Highest in the ZIP: 2590 µg/L — FALLS WATER COMPANY INC · 22,650 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 2456 µg/L 25% of the EPA limit 10000 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 684.226 µg/L No EPA limit set Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2017 | 2/2 | SYR4 |
| Barium | 123 µg/L 6.2% of the EPA limit 2000 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2017
Highest in the ZIP: 126.05 µg/L — FALLS WATER COMPANY INC · 22,650 people · 2019 | 2/2 | SYR4 |
| Lithium | 57.4 µg/L No EPA limit set Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2024 | 2/2 | UCMR-5 |
| Nitrite | 30 µg/L 3% of the EPA limit 1000 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2018 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.24 pCi/L 35% of the EPA limit 15 pCi/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2019
Highest in the ZIP: 7.178 pCi/L — FALLS WATER COMPANY INC · 22,650 people · 2019 | 2/2 | SYR4 |
| TTHM | 6.8 µg/L 8.5% of the EPA limit 80 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2019
Highest in the ZIP: 7.109 µg/L — FALLS WATER COMPANY INC · 22,650 people · 2019 | 2/2 | SYR4 |
| Copper | 3 µg/L 0.2% of the EPA limit 1300 µg/L Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2017 | 1/2 | SYR4 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Bromoform | 2.939 µg/L No EPA limit set Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 2.1656 µg/L 7.2% of the EPA limit 30 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2017 | 2/2 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Toluene | 1.74 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.7 µg/L 2.8% of the EPA limit 60 µg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.565 pCi/L 31% of the EPA limit 5 pCi/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2018 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.22 µg/L No EPA limit set Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 1.08 µg/L No EPA limit set Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9700 µg/L 16% of the EPA limit 6 µg/L Highest in the ZIP: FALLS WATER COMPANY INC · 22,650 people · 2019 | 1/2 | SYR4 |
| Chloroform | 0.5500 µg/L No EPA limit set Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: IDAHO FALLS CITY OF · 69,450 people · 2025 | 2/2 | 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.
Water suppliers serving ZIP 83401
| Supplier | State | Population served |
|---|---|---|
| IDAHO FALLS CITY OF | ID | 69,450 |
| FALLS WATER COMPANY INC | ID | 22,650 |
Frequently asked questions about ZIP 83401 tap water
Is the tap water in ZIP 83401 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 83401. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 83401?
2 public water suppliers report EPA drinking-water monitoring for ZIP 83401. Each is listed above with its population served.
What contaminants are in ZIP 83401's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Dibromochloromethane, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.