Drinking water quality · 2024
· Verified
What's in Plano, TX tap water
41 contaminants were measured in the Plano, TX water system's 2024 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 41
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Bromate
- Service area
- TX
PFAS — EPA UCMR5 (2023–2025)
4 PFAS compounds detected in Plano, 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.
PFHxA
● Detected (no federal limit)below national p90 (12.190000000000003 ng/L across detecting U.S. systems)
PFBA
● Detected (no federal limit)below national p90 (18 ng/L across detecting U.S. systems)
PFBS
● Detected (no federal limit)below national p90 (13.909999999999979 ng/L across detecting U.S. systems)
PFPeA
● Detected (no federal limit)below national p90 (15.95999999999999 ng/L across detecting U.S. systems)
Where your water comes from · EPA SDWIS
Plano, TX buys its drinking water from NORTH TEXAS MWD WYLIE WTP.
Source
Treatment
Distribution
Also buys water from NORTH TEXAS MWD WYLIE WTP.
Historical readings · EPA Six-Year Review (2012–2019)
13 historically-detected contaminants in Plano, 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) |
|---|---|---|---|
HAA5 worst: 2015 | 0.051500000000000004 mg/L 86% | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
TTHM worst: 2014 | 0.0625 mg/L within | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
COPPER worst: 2012 | 1.1500000000000001 mg/L above national p90 | — | '12'13'16'17'18'19 |
LEAD worst: 2012 | 0.0273 mg/L | — | '12'13'16'17'18'19 |
DBAA worst: 2013 | 0.0025 mg/L | — | '13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.0207 mg/L | — | '12'13'14'15'16'17'18'19 |
MBAA worst: 2012 | 0.0067 mg/L | — | '12'13'14'15'16'17'18'19 |
MCAA worst: 2012 | 0.0035 mg/L | — | '12'13'14'15'16'17'18'19 |
TCAA worst: 2012 | 0.01 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMODICHLOROMETHANE worst: 2012 | 0.013900000000000001 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.0016 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.0273 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.008400000000000001 mg/L | — | '12'13'14'15'16'17'18'19 |
Disinfection byproducts
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.53 mg/LAverageLevel of Quarterly Data | 4 mg/LMRDL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.316–0.712 mg/LRangeSystem-wide | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.363 mg/LReported levelSystem-wide | 10 mg/LMCLG | Within the limit |
| Cyanide | 28.5–128 ug/LRangeSystem-wide | 0 ug/LMCLG | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Simazine | 0.71 ug/LReported levelSystem-wide | 4 ug/LMCLG | Within the limit |
| AtrazineA widely used agricultural herbicide that reaches water through runoff. | 0.1–0.2 ug/LRangeSystem-wide | 3 ug/LMCLG | Within the limit |
| Benzene | 0–0 ug/LRangeSystem-wide | 0 ug/LMCLG | None detected |
| Benzo(a)pyrene | 0–0 ng/LRangeSystem-wide | 0 ng/LMCLG | None detected |
| Dalapon | 0–0 ug/LRangeSystem-wide | 200 ug/LMCLG | None detected |
| DBCP1,2-dibromo-3-chloropropane — a banned soil fumigant pesticide. | 0–0 ng/LRangeSystem-wide | 0 ng/LMCLG | None detected |
| Dichloromethane | 0–0 ug/LRangeSystem-wide | 0 ug/LMCLG | None detected |
| Ethylbenzene | 0–0 ug/LRangeSystem-wide | 0 ug/LMCLG | None detected |
| Ethylene dibromide | 0–0 ng/LRangeSystem-wide | 0 ng/LMCLG | None detected |
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0–0 ug/LRangeSystem-wide | 0 ug/LMCLG | None detected |
| Toluene | 0–0 mg/LRangeSystem-wide | 1 mg/LMCLG | None detected |
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0–0 ug/LRangeSystem-wide | 0 ug/LMCLG | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | 0–0 mg/LRangeSystem-wide | 10 mg/LMCLG | None detected |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.04–0.06 mg/LRangeSystem-wide | 2 mg/LMCLG | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 1.3–1.3 ug/LRangeSystem-wide | 100 ug/LMCLG | Within the limit |
| Antimony | 0–0 ug/LRangeSystem-wide | 6 ug/LMCLG | None detected |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–0 ug/LRangeSystem-wide | 0 ug/LMCLG | None detected |
| Beryllium | 0–0 ug/LRangeSystem-wide | 4 ug/LMCLG | None detected |
| Cadmium | 0–0 ug/LRangeSystem-wide | 5 ug/LMCLG | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | 0–0 ug/LRangeSystem-wide | 2 ug/LMCLG | None detected |
| SeleniumA trace element from natural deposits and industrial discharge. | 0–0 ug/LRangeSystem-wide | 50 ug/LMCLG | None detected |
| Thallium | 0–0 ug/LRangeSystem-wide | 0.5 ug/LMCLG | None detected |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cryptosporidium | 0–0RangeSystem-wide | None set | None detected |
| Giardia lamblia | 0–0RangeSystem-wide | None set | None detected |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0–0 pCi/LRangeSystem-wide | 0 pCi/LMCLG | None detected |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–0 pCi/LRangeSystem-wide | 0 pCi/LMCLG | None detected |
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 5.3–5.3 pCi/LRangeSystem-wide | 0 pCi/LMCLG | Detected — no federal limit |
People also ask about Plano, TX's water
+Is Plano, TX tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Plano, TX water utility lists 1 contaminant at or above the federal limit: Bromate. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Plano, TX tap water?
41 contaminants were measured in Plano, TX's 2024 Consumer Confidence Report, spanning vocs & pesticides, metals, and disinfection byproducts. 33 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Plano, TX tap water?
One contaminant in Plano, TX's 2024 report sits at or above the federal limit: Bromate (1.8× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Plano, TX tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is Bromate, at 1.8× the federal threshold. It belongs to the disinfection byproducts family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Plano, 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 Plano, 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.