What was found in Lewisville'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 | 2032 µg/L 20% of the EPA limit 10000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 2012 µg/L 20% of the EPA limit 10000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2015 | 1/2 | SYR4 |
| Fluoride | 673 µg/L 17% of the EPA limit 4000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Copper | 571.5 µg/L 44% of the EPA limit 1300 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Nitrite | 210 µg/L 21% of the EPA limit 1000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2015 | 1/2 | SYR4 |
| Cyanide | 128.32 µg/L 64% of the EPA limit 200 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 152 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Barium | 41.75 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 49.7 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| TTHM | 28.81 µg/L 36% of the EPA limit 80 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 44.765 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 28.065 µg/L 47% of the EPA limit 60 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Chloroform | 16.66 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 24.25 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 18.66 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 8.3 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 12.135 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Bromoform | 11.6575 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Bromate | 10.05 µg/L 101% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 4.2835 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 7.663 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 6.14 µg/L 102% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the city: UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 5.6 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.33 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Lead | 4.36 µg/L 29% of the EPA limit 15 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 1/2 | SYR4 |
| Arsenic | 3.902 µg/L 39% of the EPA limit 10 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 3.72 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Selenium | 2.341 µg/L 4.7% of the EPA limit 50 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 3.095 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Chromium | 2.668 µg/L 2.7% of the EPA limit 100 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.215 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019
Highest in the city: 2.66 µg/L — UTRWD REGIONAL WATER TREATMENT PLANT · 0 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2017 | 2/2 | SYR4 |
| Atrazine | 0.3770 µg/L 13% of the EPA limit 3 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Simazine | 0.3360 µg/L 8.4% of the EPA limit 4 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 2/2 | SYR4 |
| Antimony, Total | 0.2485 µg/L 4.1% of the EPA limit 6 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.0140 µg/L 0.7% of the EPA limit 2 µg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0078 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0046 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0045 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0032 µg/L No EPA limit set Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF LEWISVILLE · 140,880 people · 2025 | 1/2 | 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.
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 Lewisville
| Supplier | Population served |
|---|---|
| CITY OF LEWISVILLE | 140,880 |
| UTRWD REGIONAL WATER TREATMENT PLANT | 0 |
Frequently asked questions about Lewisville tap water
Is Lewisville tap water safe to drink?
EPA testing detected 34 contaminants in the water serving Lewisville. 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 Lewisville?
2 public water suppliers report drinking-water monitoring for Lewisville, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Lewisville's water?
The contaminants EPA monitoring detected in Lewisville include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Nitrite. 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.