What was found in The Woodlands'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 | 1443.5 µg/L 36% of the EPA limit 4000 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2017 | 3/14 | SYR4 |
| Copper | 126.94999999999989 µg/L 9.8% of the EPA limit 1300 µg/L Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 628.2999999999993 µg/L — THE WOODLANDS METRO CENTER MUD · 1,725 people · 2018 | 13/14 | SYR4 |
| Barium | 249.6 µg/L 12% of the EPA limit 2000 µg/L Highest in the city: WHITE OAK WATER SUPPLY CORPORATION · 900 people · 2019 | 3/14 | SYR4 |
| TTHM | 74.6 µg/L 93% of the EPA limit 80 µg/L Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 83.72499999999998 µg/L — MONTGOMERY COUNTY MUD 7 · 12,528 people · 2019 | 12/14 | SYR4 |
| Chloroform | 49.37 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 71.60499999999998 µg/L — MONTGOMERY COUNTY MUD 60 · 15,036 people · 2019 | 12/14 | SYR4 |
| Lithium | 41.8 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2025
Highest in the city: 49.9 µg/L — MONTGOMERY COUNTY WCID 1 · 7,070 people · 2024 | 10/14 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 35.035 µg/L 58% of the EPA limit 60 µg/L Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 45.19 µg/L — THE WOODLANDS MUD 1 · 7,989 people · 2019 | 13/14 | SYR4 |
| Nitrate | 40 µg/L 0.4% of the EPA limit 10000 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2019 | 3/14 | SYR4 |
| Nitrate-Nitrite | 30 µg/L 0.3% of the EPA limit 10000 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2015 | 3/14 | SYR4 |
| Dichloroacetic Acid | 19 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 24.365 µg/L — THE WOODLANDS MUD 1 · 7,989 people · 2019 | 13/14 | SYR4 |
| Bromodichloromethane | 20.489999999999995 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 21.619999999999983 µg/L — MONTGOMERY COUNTY MUD 88 · 3,183 people · 2019 | 12/14 | SYR4 |
| Lead | 10.05999999999999 µg/L 67% of the EPA limit 15 µg/L Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 21.069999999999993 µg/L — MONTGOMERY COUNTY MUD 88 · 3,183 people · 2018 | 13/14 | SYR4 |
| Trichloroacetic Acid | 12.799999999999994 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 18.794999999999998 µg/L — THE WOODLANDS MUD 1 · 7,989 people · 2019 | 11/14 | SYR4 |
| Dibromochloromethane | 16.1 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019 | 12/14 | SYR4 |
| Selenium | 14.165 µg/L 28% of the EPA limit 50 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2019 | 2/14 | SYR4 |
| Chromium | 11.3 µg/L 11% of the EPA limit 100 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2019 | 1/14 | SYR4 |
| Bromoform | 7.219999999999999 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 9.3 µg/L — MONTGOMERY COUNTY WCID 1 · 7,070 people · 2019 | 12/14 | SYR4 |
| Toluene | 5.59 µg/L 0.6% of the EPA limit 1000 µg/L Highest in the city: WHITE OAK WATER SUPPLY CORPORATION · 900 people · 2019 | 1/14 | SYR4 |
| Monochloroacetic Acid | 3.35 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 5.039999999999999 µg/L — MONTGOMERY COUNTY MUD 47 · 24,171 people · 2019 | 10/14 | SYR4 |
| Arsenic | 4.465 µg/L 45% of the EPA limit 10 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2019 | 1/14 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.300000000000001 pCi/L 29% of the EPA limit 15 pCi/L Highest in the city: WHITE OAK WATER SUPPLY CORPORATION · 900 people · 2019 | 1/14 | SYR4 |
| Dibromoacetic Acid | 3.994999999999999 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2019
Highest in the city: 4.3 µg/L — MONTGOMERY COUNTY MUD 88 · 3,183 people · 2019 | 13/14 | SYR4 |
| Combined Radium (-226 And -228) | 3.38 pCi/L 68% of the EPA limit 5 pCi/L Highest in the city: WHITE OAK WATER SUPPLY CORPORATION · 900 people · 2019 | 2/14 | SYR4 |
| Xylenes, Total | 2.1999999999999997 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: MONTGOMERY COUNTY WCID 1 · 7,070 people · 2019 | 1/14 | SYR4 |
| Monobromoacetic Acid | 1.7 µg/L No EPA limit set Highest in the city: MONTGOMERY COUNTY MUD 88 · 3,183 people · 2019 | 3/14 | SYR4 |
| Lead | 0.0025 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: MONTGOMERY COUNTY MUD 46 · 24,399 people · 2023
Highest in the city: 0.0033 mg/L — MONTGOMERY COUNTY MUD 6 · 8,610 people · 2024 | 14/14 | 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 The Woodlands
| Supplier | Population served |
|---|---|
| MONTGOMERY COUNTY MUD 46 | 24,399 |
| MONTGOMERY COUNTY MUD 47 | 24,171 |
| MONTGOMERY COUNTY MUD 67 | 16,821 |
| MONTGOMERY COUNTY MUD 60 | 15,036 |
| MONTGOMERY COUNTY MUD 7 | 12,528 |
| MONTGOMERY COUNTY MUD 6 | 8,610 |
| THE WOODLANDS MUD 1 | 7,989 |
| MONTGOMERY COUNTY WCID 1 | 7,070 |
| MONTGOMERY COUNTY MUD 36 | 5,235 |
| MONTGOMERY COUNTY MUD 39 | 4,284 |
| MONTGOMERY COUNTY MUD 88 | 3,183 |
| THE WOODLANDS METRO CENTER MUD | 1,725 |
| WHITE OAK WATER SUPPLY CORPORATION | 900 |
| RESIDENCE RV PARK | 466 |
Frequently asked questions about The Woodlands tap water
Is The Woodlands tap water safe to drink?
EPA testing detected 26 contaminants in the water serving The Woodlands. 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 The Woodlands?
14 public water suppliers report drinking-water monitoring for The Woodlands, Texas to the EPA. Each is listed above with its population served.
What contaminants are in The Woodlands's water?
The contaminants EPA monitoring detected in The Woodlands include Fluoride, Copper, Barium, TTHM, Chloroform. 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.