What was found in Middleton'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 | 600 µg/L 6% of the EPA limit 10000 µg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019
Highest in the city: 9870 µg/L — KIMPTON ACRES THIRD SUBD · 88 people · 2019 | 6/6 | SYR4 |
| Nitrate-Nitrite | 6398.5 µg/L 64% of the EPA limit 10000 µg/L Highest in the city: D AND S PURPLE SAGE RANCHETTES · 70 people · 2019 | 4/6 | SYR4 |
| Fluoride | 310 µg/L 7.8% of the EPA limit 4000 µg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019
Highest in the city: 724 µg/L — D AND S PURPLE SAGE RANCHETTES · 70 people · 2019 | 4/6 | SYR4 |
| Barium | 120 µg/L 6% of the EPA limit 2000 µg/L Highest in the city: NORTHRIDGE ESTATES WATER ASSN · 75 people · 2019 | 4/6 | SYR4 |
| Combined Uranium | 2 µg/L 6.7% of the EPA limit 30 µg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019
Highest in the city: 76 µg/L — SUNLIGHT TERRACE · 234 people · 2019 | 5/6 | SYR4 |
| TTHM | 29.35 µg/L 37% of the EPA limit 80 µg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019 | 1/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 23.825 pCi/L 159% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the city: SUNLIGHT TERRACE · 234 people · 2019 | 1/6 | SYR4 |
| Arsenic | 3.17 µg/L 32% of the EPA limit 10 µg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019
Highest in the city: 18.5 µg/L — D AND S PURPLE SAGE RANCHETTES · 70 people · 2019 | 4/6 | SYR4 |
| Lithium | 10 µg/L No EPA limit set Main supplier: MIDDLETON CITY OF · 13,190 people · 2023 | 1/6 | UCMR-5 |
| Chromium | 2.85 µg/L 2.9% of the EPA limit 100 µg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019 | 2/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.532 pCi/L 31% of the EPA limit 5 pCi/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2019
Highest in the city: 1.71 pCi/L — KIMPTON ACRES THIRD SUBD · 88 people · 2016 | 3/6 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: MIDDLETON CITY OF · 13,190 people · 2025
Highest in the city: 0.0070 mg/L — LANSING MEADOWS · 320 people · 2024 | 6/6 | LCR |
Water suppliers serving Middleton
| Supplier | Population served |
|---|---|
| MIDDLETON CITY OF | 13,190 |
| LANSING MEADOWS | 320 |
| SUNLIGHT TERRACE | 234 |
| KIMPTON ACRES THIRD SUBD | 88 |
| NORTHRIDGE ESTATES WATER ASSN | 75 |
| D AND S PURPLE SAGE RANCHETTES | 70 |
Frequently asked questions about Middleton tap water
Is Middleton tap water safe to drink?
EPA testing detected 12 contaminants in the water serving Middleton. 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 Middleton?
6 public water suppliers report drinking-water monitoring for Middleton, Idaho to the EPA. Each is listed above with its population served.
What contaminants are in Middleton's water?
The contaminants EPA monitoring detected in Middleton include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Combined Uranium. 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.