What was found in Denton'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 |
|---|---|---|---|
| Fluoride | 646.5 µg/L 16% of the EPA limit 4000 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019
Highest in the city: 941.7 µg/L — OLD ALTON WATER · 69 people · 2017 | 5/5 | SYR4 |
| Copper | 539 µg/L 41% of the EPA limit 1300 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 5/5 | SYR4 |
| Nitrate | 516.75 µg/L 5.2% of the EPA limit 10000 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 5/5 | SYR4 |
| Nitrate-Nitrite | 362.55 µg/L 3.6% of the EPA limit 10000 µg/L Highest in the city: FOREST HILL TWO WSC · 108 people · 2015 | 3/5 | SYR4 |
| Cyanide | 122.13 µg/L 61% of the EPA limit 200 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 3/5 | SYR4 |
| Barium | 50.47 µg/L 2.5% of the EPA limit 2000 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 5/5 | SYR4 |
| TTHM | 48.54 µg/L 61% of the EPA limit 80 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 4/5 | SYR4 |
| Lithium | 10.1 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2023
Highest in the city: 28 µg/L — MULLINS MOBILE HOME PARK · 87 people · 2024 | 2/5 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 25.62 µg/L 43% of the EPA limit 60 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 2/5 | SYR4 |
| Chloroform | 23.55 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Bromodichloromethane | 17.17 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 13.96 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Dichloroacetic Acid | 12.6 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Chromium | 3.5 µg/L 3.5% of the EPA limit 100 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019
Highest in the city: 8.765 µg/L — MULLINS MOBILE HOME PARK · 87 people · 2019 | 5/5 | SYR4 |
| Dibromochloromethane | 7.847 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 5/5 | SYR4 |
| Bromate | 4.445 µg/L 44% of the EPA limit 10 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Bromoform | 3.95 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 5/5 | SYR4 |
| Dibromoacetic Acid | 3.29 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Monochloroacetic Acid | 3.2 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Monobromoacetic Acid | 2.8 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2019
Highest in the city: 2.9 µg/L — OLD ALTON WATER · 69 people · 2018 | 2/5 | SYR4 |
| Combined Radium (-226 And -228) | 2.6 pCi/L 52% of the EPA limit 5 pCi/L Highest in the city: MULLINS MOBILE HOME PARK · 87 people · 2012 | 3/5 | SYR4 |
| Selenium | 2.58 µg/L 5.2% of the EPA limit 50 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Lead | 1.82 µg/L 12% of the EPA limit 15 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019
Highest in the city: 2.3 µg/L — FOREST HILL TWO WSC · 108 people · 2018 | 4/5 | SYR4 |
| Xylenes, Total | 1.86 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Arsenic | 1.08 µg/L 11% of the EPA limit 10 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Carbon Tetrachloride | 0.8100 µg/L 16% of the EPA limit 5 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Simazine | 0.2300 µg/L 5.8% of the EPA limit 4 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Antimony, Total | 0.2100 µg/L 3.5% of the EPA limit 6 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Atrazine | 0.2000 µg/L 6.7% of the EPA limit 3 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Thallium, Total | 0.0170 µg/L 0.9% of the EPA limit 2 µg/L Main supplier: CITY OF DENTON · 150,037 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0089 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2023 | 1/5 | UCMR-5 |
| Pfhxa | 0.0058 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2023 | 1/5 | UCMR-5 |
| Pfpea | 0.0057 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2023 | 1/5 | UCMR-5 |
| PFBS | 0.0047 µg/L No EPA limit set Main supplier: CITY OF DENTON · 150,037 people · 2023 | 1/5 | UCMR-5 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: CITY OF DENTON · 150,037 people · 2024 | 5/5 | 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 Denton
| Supplier | Population served |
|---|---|
| CITY OF DENTON | 150,037 |
| FOREST HILL TWO WSC | 108 |
| OAK BEND HOMEOWNERS WATER SUPPLY | 87 |
| MULLINS MOBILE HOME PARK | 87 |
| OLD ALTON WATER | 69 |
Frequently asked questions about Denton tap water
Is Denton tap water safe to drink?
EPA testing detected 35 contaminants in the water serving Denton. 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 Denton?
5 public water suppliers report drinking-water monitoring for Denton, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Denton's water?
The contaminants EPA monitoring detected in Denton include Fluoride, Copper, Nitrate, Nitrate-Nitrite, Cyanide. 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.