What was found in Cedar Park'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 | 721 µg/L 55% of the EPA limit 1300 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2017
Highest in the city: 938.55 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2018 | 3/3 | SYR4 |
| Fluoride | 733 µg/L 18% of the EPA limit 4000 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 778 µg/L — HIGH GABRIEL WSC · 492 people · 2018 | 2/3 | SYR4 |
| Nitrate | 501.5 µg/L 5% of the EPA limit 10000 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 2/3 | SYR4 |
| Barium | 67.61 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 84.235 µg/L — HIGH GABRIEL WSC · 492 people · 2017 | 2/3 | SYR4 |
| TTHM | 77.14 µg/L 96% of the EPA limit 80 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 81.44 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2019 | 3/3 | SYR4 |
| Cyanide | 49.5 µg/L 25% of the EPA limit 200 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 1/3 | SYR4 |
| Chloroform | 27.1 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 37.31 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.545 µg/L 44% of the EPA limit 60 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 30.76 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 30 µg/L 0.3% of the EPA limit 10000 µg/L Highest in the city: HIGH GABRIEL WSC · 492 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 25.015 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 25.57 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 22.225 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 3/3 | SYR4 |
| Lead | 4.448 µg/L 30% of the EPA limit 15 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2017
Highest in the city: 21.65 µg/L — HIGH GABRIEL WSC · 492 people · 2017 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.2 pCi/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2017
Highest in the city: 16.6 pCi/L — HIGH GABRIEL WSC · 492 people · 2018 | 2/3 | SYR4 |
| Dichloroacetic Acid | 13.735 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 15.94 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 14.055 pCi/L 94% of the EPA limit 15 pCi/L Highest in the city: HIGH GABRIEL WSC · 492 people · 2018 | 1/3 | SYR4 |
| Trichloroacetic Acid | 8.985 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 11.49 µg/L — WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2019 | 2/3 | SYR4 |
| Lithium | 10.7 µg/L No EPA limit set Highest in the city: WILLIAMSON TRAVIS COUNTY MUD 1 · 5,793 people · 2024 | 1/3 | UCMR-5 |
| Bromoform | 7.3 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 7 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 6.55 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 2/3 | SYR4 |
| Selenium | 3.98 µg/L 8% of the EPA limit 50 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019
Highest in the city: 4.7 µg/L — HIGH GABRIEL WSC · 492 people · 2017 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 4.59 pCi/L 92% of the EPA limit 5 pCi/L Highest in the city: HIGH GABRIEL WSC · 492 people · 2018 | 1/3 | SYR4 |
| Monobromoacetic Acid | 3.76 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 2/3 | SYR4 |
| Arsenic | 2.35 µg/L 24% of the EPA limit 10 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 1.76 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: HIGH GABRIEL WSC · 492 people · 2019 | 1/3 | SYR4 |
| Chromium | 1.03 µg/L 1% of the EPA limit 100 µg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0050 µg/L No EPA limit set Main supplier: CITY OF CEDAR PARK · 86,939 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0040 mg/L 26% of the EPA limit 0.0150 mg/L Main supplier: CITY OF CEDAR PARK · 86,939 people · 2023 | 3/3 | 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 Cedar Park
| Supplier | Population served |
|---|---|
| CITY OF CEDAR PARK | 86,939 |
| WILLIAMSON TRAVIS COUNTY MUD 1 | 5,793 |
| HIGH GABRIEL WSC | 492 |
Frequently asked questions about Cedar Park tap water
Is Cedar Park tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Cedar Park. 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 Cedar Park?
3 public water suppliers report drinking-water monitoring for Cedar Park, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Cedar Park's water?
The contaminants EPA monitoring detected in Cedar Park include Copper, Fluoride, Nitrate, Barium, TTHM. 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.