Drinking water quality · 2024
· Verified
· PWSID TX0430007
What's in Plano, TX tap water
Every one of the 19 core regulated contaminants reported for Plano, TX came in below its federal limit.
- !1 contaminant within 20% of a limit
- !19 of 27 core regulated contaminants reported — 8 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −0 core regulated contaminants never reported (19/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Bromate92% of the federal limit9.19–9.19 ug/L · limit 10 ug/L
Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.
higher than 95% of U.S. systems
+59 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Copper | 1.01 mg/L | 1.3 mg/L |
| Cyanide | 128 ug/L | 200 ug/L |
| Chlorine | 2.53 mg/L | 4 mg/L |
| HAA5 | 12.4–36.5 ug/L | 60 ug/L |
| Lead | 0.00297 mg/L | 0.015 mg/L |
| Chlorite | 0.187 mg/L | 1 mg/L |
| Fluoride | 0.316–0.712 mg/L | 4 mg/L |
| Simazine | 0.71 ug/L | 4 ug/L |
| Atrazine | 0.1–0.2 ug/L | 3 ug/L |
| Nitrate | 0.363 mg/L | 10 mg/L |
| Barium | 0.06 mg/L | 2 mg/L |
| Chromium | 1.3 ug/L | 100 ug/L |
| Bromodichloromethane | 7.7–20.4 ug/L | — |
| Bromoform | 2.07 ug/L | — |
| Chloroform | 20.1 ug/L | — |
| Dibromochloromethane | 14.9 ug/L | — |
| Antimony | 0–0 ug/L | 6 ug/L |
| Arsenic | 0–0 ug/L | 10 ug/L |
| Beryllium | 0–0 ug/L | 4 ug/L |
| Cadmium | 0–0 ug/L | 5 ug/L |
| Mercury | 0–0 ug/L | 2 ug/L |
| Selenium | 0–0 ug/L | 50 ug/L |
| Thallium | 0–0 ug/L | 2 ug/L |
| Cryptosporidium | 0 | — |
| Giardia lamblia | 0 | — |
| Alachlor | 0–0 ug/L | 2 ug/L |
| Carbofuran | 0–0 ug/L | 40 ug/L |
| Carbon Tetrachloride | 0–0 ug/L | 5 ug/L |
| Chlordane | 0–0 ug/L | 2 ug/L |
| Chlorobenzene | 0–0 ug/L | 100 ug/L |
| Dinoseb | 0–0 ug/L | 7 ug/L |
| Edb | 0–0 ng/L | 5000000 ng/L |
| Endrin | 0–0 ug/L | 2 ug/L |
| Heptachlor | 0–0 ng/L | 400 ng/L |
| Heptachlor Epoxide | 0–0 ng/L | 200 ng/L |
| Hexachlorobenzene | 0–0 ug/L | 1 ug/L |
| Lindane | 0–0 ng/L | 200 ng/L |
| Methoxychlor | 0–0 ug/L | 40 ug/L |
| Oxamyl | 0–0 ug/L | 200 ug/L |
| Pce | 0–0 ug/L | 5 ug/L |
| Pentachlorophenol | 0–0 ug/L | 1 ug/L |
| Picloram | 0–0 ug/L | 500 ug/L |
| Styrene | 0–0 ug/L | 100 ug/L |
| Tce | 0–0 ug/L | 5 ug/L |
| Toxaphene | 0–0 ug/L | 3 ug/L |
| Vinyl Chloride | 0–0 ug/L | 2 ug/L |
| Combined Radium | 0–0 pCi/L | 5 pCi/L |
| Gross Alpha | 0–0 pCi/L | 15 pCi/L |
| Benzene | 0–0 ug/L | 5 ug/L |
| Dalapon | 0–0 ug/L | 200 ug/L |
| DBCP | 0–0 ng/L | 200 ng/L |
| Dichloromethane | 0–0 ug/L | 5 ug/L |
| Ethylbenzene | 0–0 ug/L | 700 ug/L |
| Toluene | 0–0 mg/L | 1 mg/L |
| Xylenes | 0–0 mg/L | 10 mg/L |
| PFHxA | 4.4 ng/L | — |
| PFBA | 7.3 ng/L | — |
| PFBS | 3.1 ng/L | — |
| PFPeA | 4.3 ng/L | — |
What this report doesn't tell you
8 of the 27 contaminants a community water system normally reports do not appear anywhere in Plano, TX's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
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)PFBA
● Detected (no federal limit)PFBS
● Detected (no federal limit)PFPeA
● Detected (no federal limit)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.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based2 violations on record · most recent Apr 2011resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗