What was found in Huntsville'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 | 5397.5 µg/L 54% of the EPA limit 10000 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 8/9 | SYR4 |
| Nitrate-Nitrite | 2957.5 µg/L 30% of the EPA limit 10000 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2015 | 6/9 | SYR4 |
| Fluoride | 613.5 µg/L 15% of the EPA limit 4000 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 1342 µg/L — PHELPS SUD · 1,900 people · 2018 | 9/9 | SYR4 |
| Copper | 768.2 µg/L 59% of the EPA limit 1300 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 1096.8 µg/L — WALKER COUNTY SUD D · 2,184 people · 2017 | 9/9 | SYR4 |
| Chlorite | 390 µg/L 39% of the EPA limit 1000 µg/L Highest in the city: TRA HUNTSVILLE REGIONAL WATER SUPPLY · 0 people · 2019 | 1/9 | SYR4 |
| Barium | 141.95 µg/L 7.1% of the EPA limit 2000 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 215.7 µg/L — WATSON LAKES WSC · 330 people · 2016 | 9/9 | SYR4 |
| Cyanide | 39.5 µg/L 20% of the EPA limit 200 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 197.5 µg/L — TRA HUNTSVILLE REGIONAL WATER SUPPLY · 0 people · 2019 | 3/9 | SYR4 |
| Lithium | 60.2 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| TTHM | 51.875 µg/L 65% of the EPA limit 80 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 7/9 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.8 pCi/L 32% of the EPA limit 15 pCi/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 29.21 pCi/L — WATSON LAKES WSC · 330 people · 2016 | 4/9 | SYR4 |
| Dibromochloromethane | 20.9 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 7/9 | SYR4 |
| Gross Beta Particle Activity | 12.625 pCi/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 19 pCi/L — WALKER COUNTY SUD F · 447 people · 2018 | 7/9 | SYR4 |
| Combined Radium (-226 And -228) | 2.45 pCi/L 49% of the EPA limit 5 pCi/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 16.9 pCi/L — WALKER COUNTY SUD D · 2,184 people · 2012 | 9/9 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16.34 µg/L 27% of the EPA limit 60 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 8/9 | SYR4 |
| Bromodichloromethane | 14.2 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 7/9 | SYR4 |
| Chloroform | 13.66 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 4/9 | SYR4 |
| Lead | 13.4 µg/L 89% of the EPA limit 15 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017 | 6/9 | SYR4 |
| Bromoform | 12.64 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 7/9 | SYR4 |
| Selenium | 12.515 µg/L 25% of the EPA limit 50 µg/L Highest in the city: PHELPS SUD · 1,900 people · 2018 | 2/9 | SYR4 |
| Arsenic | 3.695 µg/L 37% of the EPA limit 10 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2017
Highest in the city: 10.555 µg/L — PHELPS SUD · 1,900 people · 2018 | 5/9 | SYR4 |
| Nitrite | 10 µg/L 1% of the EPA limit 1000 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2015 | 1/9 | SYR4 |
| Dichloroacetic Acid | 9.7 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 5/9 | SYR4 |
| Dibromoacetic Acid | 7.265 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 7/9 | SYR4 |
| Combined Uranium | 6.18 µg/L 21% of the EPA limit 30 µg/L Highest in the city: WATSON LAKES WSC · 330 people · 2016 | 2/9 | SYR4 |
| Monobromoacetic Acid | 4.995 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 1/9 | SYR4 |
| Trichloroacetic Acid | 4.5 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019
Highest in the city: 4.58 µg/L — TRA HUNTSVILLE REGIONAL WATER SUPPLY · 0 people · 2019 | 2/9 | SYR4 |
| Monochloroacetic Acid | 4.025 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019 | 2/9 | SYR4 |
| Xylenes, Total | 1.17 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019
Highest in the city: 1.3 µg/L — PHELPS SUD · 1,900 people · 2019 | 5/9 | SYR4 |
| Atrazine | 0.1285 µg/L 4.3% of the EPA limit 3 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019
Highest in the city: 0.5000 µg/L — TRA HUNTSVILLE REGIONAL WATER SUPPLY · 0 people · 2019 | 2/9 | SYR4 |
| Simazine | 0.2400 µg/L 6% of the EPA limit 4 µg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2019
Highest in the city: 0.3130 µg/L — TRA HUNTSVILLE REGIONAL WATER SUPPLY · 0 people · 2019 | 2/9 | SYR4 |
| Pfpea | 0.0194 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| Pfhxa | 0.0179 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| Pfba | 0.0129 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| PFBS | 0.0095 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| PFOS | 0.0089 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| PFHXS | 0.0083 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| Pfhpa | 0.0067 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| PFOA | 0.0060 µg/L No EPA limit set Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2024 | 1/9 | UCMR-5 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: CITY OF HUNTSVILLE · 48,522 people · 2023
Highest in the city: 0.0038 mg/L — WATSON LAKES WSC · 330 people · 2024 | 8/9 | 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.
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 Huntsville
| Supplier | Population served |
|---|---|
| CITY OF HUNTSVILLE | 48,522 |
| WALKER COUNTY SUD D | 2,184 |
| PHELPS SUD | 1,900 |
| WALKER COUNTY SUD B CRABBS PRAIRIE | 1,815 |
| WALKER COUNTY SUD C | 1,674 |
| WALKER COUNTY SUD A | 1,458 |
| WALKER COUNTY SUD F | 447 |
| WATSON LAKES WSC | 330 |
| TRA HUNTSVILLE REGIONAL WATER SUPPLY | 0 |
Frequently asked questions about Huntsville tap water
Is Huntsville tap water safe to drink?
EPA testing detected 39 contaminants in the water serving Huntsville. 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 Huntsville?
9 public water suppliers report drinking-water monitoring for Huntsville, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Huntsville's water?
The contaminants EPA monitoring detected in Huntsville include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Chlorite. 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.