What was found in Willis'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 |
|---|---|---|---|
| Copper | 100.96 µg/L 7.8% of the EPA limit 1300 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2018
Highest in the city: 2184 µg/L — TIMBER LINE ESTATES · 579 people · 2019 | 15/15 | SYR4 |
| Fluoride | 1568 µg/L 39% of the EPA limit 4000 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 15/15 | SYR4 |
| Barium | 222.3 µg/L 11% of the EPA limit 2000 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019
Highest in the city: 316.9 µg/L — CREEKSIDE ACRES WATER SYSTEM · 567 people · 2019 | 15/15 | SYR4 |
| Lithium | 199 µg/L No EPA limit set Main supplier: CITY OF WILLIS · 14,133 people · 2025 | 1/15 | UCMR-5 |
| Nitrate | 60 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 11/15 | SYR4 |
| Nitrate-Nitrite | 57.5 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2015 | 10/15 | SYR4 |
| TTHM | 55.2 µg/L 69% of the EPA limit 80 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 9/15 | SYR4 |
| Bromoform | 41.525 µg/L No EPA limit set Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 6/15 | SYR4 |
| Lead | 6.358 µg/L 42% of the EPA limit 15 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2018
Highest in the city: 36.75 µg/L — CAPE MALIBU WSC · 250 people · 2017 | 14/15 | SYR4 |
| Nitrite | 30 µg/L 3% of the EPA limit 1000 µg/L Highest in the city: CREEKSIDE ACRES WATER SYSTEM · 567 people · 2015 | 3/15 | SYR4 |
| Gross Beta Particle Activity | 7.71 pCi/L No EPA limit set Main supplier: CITY OF WILLIS · 14,133 people · 2019
Highest in the city: 14.08 pCi/L — BRIDGEPOINT SUBDIVISION · 291 people · 2019 | 15/15 | SYR4 |
| Dibromochloromethane | 13.6 µg/L No EPA limit set Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 9/15 | SYR4 |
| Combined Uranium | 9.7 µg/L 32% of the EPA limit 30 µg/L Highest in the city: ROGERS ROAD WATER SYSTEM · 567 people · 2018 | 2/15 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.18 pCi/L 41% of the EPA limit 15 pCi/L Main supplier: CITY OF WILLIS · 14,133 people · 2019
Highest in the city: 7.44 pCi/L — CAPE MALIBU WSC · 250 people · 2019 | 9/15 | SYR4 |
| Selenium | 6.97 µg/L 14% of the EPA limit 50 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 2/15 | SYR4 |
| Chloroform | 6.38 µg/L No EPA limit set Highest in the city: TIMBER LINE ESTATES · 579 people · 2019 | 7/15 | SYR4 |
| Dibromoacetic Acid | 5.75 µg/L No EPA limit set Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 1/15 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.75 µg/L 9.6% of the EPA limit 60 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 4/15 | SYR4 |
| Arsenic | 2.58 µg/L 26% of the EPA limit 10 µg/L Main supplier: CITY OF WILLIS · 14,133 people · 2019
Highest in the city: 5.245 µg/L — TIMBER LINE ESTATES · 579 people · 2017 | 6/15 | SYR4 |
| Xylenes, Total | 4.1 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: ROGERS ROAD WATER SYSTEM · 567 people · 2019 | 2/15 | SYR4 |
| Combined Radium (-226 And -228) | 1.413 pCi/L 28% of the EPA limit 5 pCi/L Main supplier: CITY OF WILLIS · 14,133 people · 2016
Highest in the city: 3.8 pCi/L — TIMBER LINE ESTATES · 579 people · 2014 | 11/15 | SYR4 |
| Bromodichloromethane | 3 µg/L No EPA limit set Main supplier: CITY OF WILLIS · 14,133 people · 2019 | 9/15 | SYR4 |
| Dichloroacetic Acid | 1.6 µg/L No EPA limit set Highest in the city: BRIDGEPOINT SUBDIVISION · 291 people · 2019 | 3/15 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.5 µg/L 25% of the EPA limit 6 µg/L Highest in the city: ROGERS ROAD WATER SYSTEM · 567 people · 2019 | 2/15 | SYR4 |
| Ethylbenzene | 0.6000 µg/L 0.1% of the EPA limit 700 µg/L Highest in the city: ROGERS ROAD WATER SYSTEM · 567 people · 2019 | 1/15 | SYR4 |
| Lead | 0.00070 mg/L 4.7% of the EPA limit 0.0150 mg/L Main supplier: CITY OF WILLIS · 14,133 people · 2025
Highest in the city: 0.0070 mg/L — CREEKSIDE ACRES WATER SYSTEM · 567 people · 2025 | 15/15 | 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 Willis
| Supplier | Population served |
|---|---|
| CITY OF WILLIS | 14,133 |
| WALNUT COVE WSC | 2,076 |
| EMERSON ESTATES | 1,974 |
| SAN JO UTILITIES | 792 |
| CLEAR WATER COVE | 645 |
| TIMBER LINE ESTATES | 579 |
| ROGERS ROAD WATER SYSTEM | 567 |
| CREEKSIDE ACRES WATER SYSTEM | 567 |
| MONTGOMERY COUNTY FWSD 6 | 426 |
| CONROE BAY WATER SEWER SUPPLY | 345 |
| BRIDGEPOINT SUBDIVISION | 291 |
| MOUNT PLEASANT VILLAGE WATER SYSTEM | 255 |
| CAPE MALIBU WSC | 250 |
| BEE CREEK ESTATES | 228 |
| NEW DANVILLE COMMUNITY | 159 |
Frequently asked questions about Willis tap water
Is Willis tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Willis. 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 Willis?
15 public water suppliers report drinking-water monitoring for Willis, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Willis's water?
The contaminants EPA monitoring detected in Willis include Copper, Fluoride, Barium, Lithium, Nitrate. 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.