Drinking water quality · 2024
· Verified
What's in Round Rock, TX tap water
11 contaminants were measured in the Round Rock, TX water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 11
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- TX
PFAS — EPA UCMR5 (2023–2025)
5 PFAS compounds detected in Round Rock, TX
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFPeA
● Detected (no federal limit)below national p90 (15.95999999999999 ng/L across detecting U.S. systems)
PFHxA
● Detected (no federal limit)below national p90 (12.190000000000003 ng/L across detecting U.S. systems)
Lithium
● Detected (no federal limit)below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PFBS
● Detected (no federal limit)below national p90 (13.909999999999979 ng/L across detecting U.S. systems)
PFBA
● Detected (no federal limit)below national p90 (18 ng/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Round Rock, TX's drinking water comes from ground water, drawn from 4 sources.
Source
- INTAKE 1 - LAKE GEORGETOWN
- 1 - LAKE CREEK PS / 501 N MAYS ST
- 3 - LAKE CREEK PS / 501 N MAYS ST
- 4 - LAKE CREEK PS / 501 N MAYS ST
Treatment
- SWTP I - PHASE III, IV, VA, VB
- PLANT - LAKE CREEK / 501 N MAYS ST
Distribution
Also buys water from CITY OF AUSTIN WATER & WASTEWATER, CITY OF GEORGETOWN, and 1 more.
Historical readings · EPA Six-Year Review (2012–2019)
21 historically-detected contaminants in Round Rock, TX
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
TTHM worst: 2015 | 0.0771 mg/L 96% | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
CYANIDE worst: 2016 | 0.12 mg/L within near national p90 | 0.2 mg/L | '14'15'16'17'18'19 |
NITRATE worst: 2013 | 5.9 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2013 | 5.79 mg/L within | 10 mg/L | '12'13'15 |
HAA5 worst: 2015 | 0.0345 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2013 | 0.00168 mg/L within below national p90 | 0.01 mg/L | '13 |
SELENIUM worst: 2013 | 0.00438 mg/L within | 0.05 mg/L | '13 |
FLUORIDE worst: 2014 | 0.33 mg/L within | 4 mg/L | '12'13'14'15'16'17'18'19 |
ATRAZINE worst: 2014 | 0.00018 mg/L within below national p90 | 0.003 mg/L | '14'15 |
BARIUM worst: 2019 | 0.0537 mg/L within below national p90 | 2 mg/L | '13'14'15'16'17'18'19 |
COPPER worst: 2012 | 1.41 mg/L above national p90 | — | '12'13'14'15'16'17'18 |
LEAD worst: 2012 | 0.0127 mg/L | — | '12'15'17'18 |
MBAA worst: 2012 | 0.0036 mg/L | — | '12'13'14'15 |
DBAA worst: 2012 | 0.0082 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.013 mg/L | — | '12'13'14'15'16'17'18'19 |
MCAA worst: 2012 | 0.0046 mg/L | — | '12'13'15'16'19 |
TCAA worst: 2012 | 0.0056 mg/L | — | '12'13'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.0233 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0128 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0185 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.0234 mg/L | — | '12'13'14'15'16'17'18'19 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 1.99 mg/LAverageSystem-wide | 4 mg/LMRDL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 239 mg/LAverageSystem-wide | 1000 mg/LMCL | Within the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.065 NTUAverageSystem-wide | 0.3 NTUMCL | Within the limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.87 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LAverageSystem-wide | 5 pCi/LMCL | None detected |
People also ask about Round Rock, TX's water
+Is Round Rock, TX tap water safe to drink in 2024?
Every one of the 11 contaminants measured in Round Rock, TX's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Round Rock, TX tap water?
11 contaminants were measured in Round Rock, TX's 2024 Consumer Confidence Report, spanning physical & aggregate, disinfection byproducts, and disinfectants. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Round Rock, TX's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Round Rock, TX's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.