What was found in Waller'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 | 417.5 µg/L 10% of the EPA limit 4000 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 995.5 µg/L — G & W WSC WOODLAND LAKES WATER SYSTEM · 1,110 people · 2019 | 5/5 | SYR4 |
| Nitrate-Nitrite | 210 µg/L 2.1% of the EPA limit 10000 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2015
Highest in the city: 445 µg/L — SKY LAKES WSC · 537 people · 2019 | 3/5 | SYR4 |
| Nitrate | 285.5 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 444.5 µg/L — SKY LAKES WSC · 537 people · 2019 | 4/5 | SYR4 |
| Copper | 177.5 µg/L 14% of the EPA limit 1300 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2017
Highest in the city: 305.735 µg/L — SKY LAKES WSC · 537 people · 2018 | 5/5 | SYR4 |
| Barium | 230.5 µg/L 12% of the EPA limit 2000 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 246.85 µg/L — G & W WSC · 3,343 people · 2019 | 5/5 | SYR4 |
| Chloroform | 8.64 µg/L No EPA limit set Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 78.3 µg/L — SKY LAKES WSC · 537 people · 2019 | 4/5 | SYR4 |
| Bromodichloromethane | 10.995 µg/L No EPA limit set Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 50.4 µg/L — SKY LAKES WSC · 537 people · 2019 | 4/5 | SYR4 |
| TTHM | 1.665 µg/L 2.1% of the EPA limit 80 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 47.76 µg/L — G & W WSC WOODLAND LAKES WATER SYSTEM · 1,110 people · 2019 | 3/5 | SYR4 |
| Lithium | 22.8 µg/L No EPA limit set Main supplier: CITY OF WALLER · 5,448 people · 2025
Highest in the city: 38 µg/L — G & W WSC · 3,343 people · 2025 | 2/5 | UCMR-5 |
| Toluene | 30 µg/L 3% of the EPA limit 1000 µg/L Highest in the city: SKY LAKES WSC · 537 people · 2019 | 2/5 | SYR4 |
| Dibromochloromethane | 8.31 µg/L No EPA limit set Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 19.5 µg/L — SKY LAKES WSC · 537 people · 2019 | 4/5 | SYR4 |
| Bromoform | 18.16 µg/L No EPA limit set Main supplier: CITY OF WALLER · 5,448 people · 2019 | 4/5 | SYR4 |
| Xylenes, Total | 16.4 µg/L 0.2% of the EPA limit 10000 µg/L Highest in the city: G & W WSC · 3,343 people · 2019 | 2/5 | SYR4 |
| Lead | 9.11 µg/L 61% of the EPA limit 15 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2017
Highest in the city: 10.23 µg/L — SKY LAKES WSC · 537 people · 2018 | 4/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 9.97 pCi/L — G & W WSC · 3,343 people · 2019 | 2/5 | SYR4 |
| Gross Beta Particle Activity | 8.81 pCi/L No EPA limit set Highest in the city: G & W WSC · 3,343 people · 2019 | 2/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.61 µg/L 14% of the EPA limit 60 µg/L Highest in the city: G & W WSC · 3,343 people · 2019 | 2/5 | SYR4 |
| Dichloromethane | 8 µg/L 160% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the city: SKY LAKES WSC · 537 people · 2019 | 1/5 | SYR4 |
| Arsenic | 6.255 µg/L 63% of the EPA limit 10 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 6.395 µg/L — G & W WSC WOODLAND LAKES WATER SYSTEM · 1,110 people · 2019 | 4/5 | SYR4 |
| Selenium | 5.68 µg/L 11% of the EPA limit 50 µg/L Highest in the city: SKY LAKES WSC · 537 people · 2019 | 2/5 | SYR4 |
| Dichloroacetic Acid | 4.6 µg/L No EPA limit set Highest in the city: G & W WSC · 3,343 people · 2019 | 2/5 | SYR4 |
| Dibromoacetic Acid | 3.115 µg/L No EPA limit set Highest in the city: G & W WSC WOODLAND LAKES WATER SYSTEM · 1,110 people · 2019 | 2/5 | SYR4 |
| Combined Radium (-226 And -228) | 0.6500 pCi/L 13% of the EPA limit 5 pCi/L Main supplier: CITY OF WALLER · 5,448 people · 2015
Highest in the city: 2.286 pCi/L — G & W WSC · 3,343 people · 2018 | 4/5 | SYR4 |
| Ethylbenzene | 2.2 µg/L 0.3% of the EPA limit 700 µg/L Highest in the city: G & W WSC · 3,343 people · 2019 | 1/5 | SYR4 |
| Combined Uranium | 2 µg/L 6.7% of the EPA limit 30 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019 | 1/5 | SYR4 |
| Trichloroacetic Acid | 1.6 µg/L No EPA limit set Highest in the city: G & W WSC · 3,343 people · 2019 | 1/5 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1 µg/L 17% of the EPA limit 6 µg/L Main supplier: CITY OF WALLER · 5,448 people · 2019
Highest in the city: 1.1 µg/L — SKY LAKES WSC · 537 people · 2019 | 2/5 | SYR4 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: CITY OF WALLER · 5,448 people · 2023 | 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 Waller
| Supplier | Population served |
|---|---|
| CITY OF WALLER | 5,448 |
| G & W WSC | 3,343 |
| G & W WSC WOODLAND LAKES WATER SYSTEM | 1,110 |
| SKY LAKES WSC | 537 |
| SPRING PRESERVE WATER SYSTEM | 150 |
Frequently asked questions about Waller tap water
Is Waller tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Waller. 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 Waller?
5 public water suppliers report drinking-water monitoring for Waller, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Waller's water?
The contaminants EPA monitoring detected in Waller include Fluoride, Nitrate-Nitrite, Nitrate, Copper, Barium. 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.