Drinking water quality · 2024
· Verified
· PWSID TX0610004
What's in Lewisville, TX tap water
Every one of the 10 core regulated contaminants reported for Lewisville, TX came in below its federal limit.
- !1 open monitoring or reporting violation
- !10 of 27 core regulated contaminants reported — 17 never appear in this report
- ✓Nothing over a federal limit
+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
- −0 contaminants within 20% of a limit
- −0 open health-based violations
- −3 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −14 core regulated contaminants never reported (10/27)
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 →+31 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Bromate | 5.5 ug/L | 10 ug/L |
| Cyanide | 99 ug/L | 200 ug/L |
| TTHM | 22.7 ug/L | 80 ug/L |
| HAA5 | 14.2 ug/L | 60 ug/L |
| Copper | 0.26 mg/L | 1.3 mg/L |
| Fluoride | 0.65–0.706 mg/L | 4 mg/L |
| Arsenic | 1.5 ug/L | 10 ug/L |
| Nitrate | 0.8 mg/L | 10 mg/L |
| Atrazine | 0.2 ug/L | 3 ug/L |
| Simazine | 0.15 ug/L | 4 ug/L |
| Chromium | 2.7 ug/L | 100 ug/L |
| Barium | 0.027–0.036 mg/L | 2 mg/L |
| Nitrite | 0.017 mg/L | 1 mg/L |
| Bromodichloromethane | 4 ug/L | — |
| Bromoform | 1.36 ug/L | — |
| Chloroform | 3.17 ug/L | — |
| Dibromochloromethane | 4.07 ug/L | — |
| Chloride | 36.23 mg/L | — |
| Sulfate | 74.2 mg/L | — |
| Aluminum | 0.012 mg/L | — |
| Lead | 0.0 mg/L | 0.015 mg/L |
| Manganese | 0.003 mg/L | — |
| Sodium | 32.77 mg/L | — |
| Alkalinity | 104.7 mg/L | — |
| Bicarbonate | 104.7 mg/L | — |
| Hardness | 162 mg/L | — |
| Radon | Not detected pCi/L | — |
| PFBA | 7.8 ng/L | — |
| PFHxA | 4.6 ng/L | — |
| PFPeA | 4.5 ng/L | — |
| PFBS | 3.2 ng/L | — |
What this report doesn't tell you
17 of the 27 contaminants a community water system normally reports do not appear anywhere in Lewisville, 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 Lewisville, 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.
PFBA
● Detected (no federal limit)PFHxA
● Detected (no federal limit)PFPeA
● Detected (no federal limit)PFBS
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Lewisville, TX's drinking water comes from surface water, drawn from 2 sources.
Source
- INTAKE · 2
Treatment
- SWTP - CITY OF LEWISVILLE
- BOOSTER PLANT - S VALLEY PARKWAY
- BOOSTER PLANT - WINDHAVEN PARKWAY
- + 1 more
Distribution
Also buys water from DALLAS WATER UTILITY, UTRWD REGIONAL WATER TREATMENT PLANT.
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.
- Monitoring & reporting1 violation on record · most recent Dec 20251 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗