Tap water · TX
Dallas Water Utilities
EPA system ID TX0570004 · serves about 1,356,479 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What Dallas Water Utilities found in 2025
23 detected analytes from the utility’s own annual report, hand-normalized — nothing was near or over a federal health-based limit.
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| Total Chlorine Residual | 2.97 ppm | 4 ppm | 74% | Within limit |
| Copper (90th percentile) | 0.39 ppm | 1.3 ppm | 30% | Within limit |
| Total Haloacetic Acids | 15.1 ppb | 60 ppb | 25% | Within limit |
| Total Trihalomethanes | 19.7 ppb | 80 ppb | 25% | Within limit |
| Cyanide | 45.2 ppb | 200 ppb | 23% | Within limit |
| Fluoride | 0.627 ppm | 4 ppm | 16% | Within limit |
| Gross beta particle activity | 5.7 pCi/L | 50 pCi/L | 11% | Within limit |
| Lead (90th percentile) | 1.1 ppb | 15 ppb | 7% | Within limit |
| Nitrate (as N) | 0.671 ppm | 10 ppm | 7% | Within limit |
| Manganese | 2.27 ppb | 50 ppb | 5% | Within limit |
| Atrazine | 0.1 ppb | 3 ppb | 3% | Within limit |
| Barium | 0.037 ppm | 2 ppm | 2% | Within limit |
| Simazine | 0.03 ppb | 4 ppb | 1% | Within limit |
| Nitrite (as N) | 0.006 ppm | 1 ppm | 1% | Within limit |
| Bromate | 0 ppb | 10 ppb | 0% | Within limit |
| Aluminum | 5 ppb | — | — | No federal limit |
| Chloroform | 4.57 ppb | — | — | No federal limit |
| Bromodichloromethane | 4.43 ppb | — | — | No federal limit |
| Dibromochloromethane | 3.5 ppb | — | — | No federal limit |
| Total Organic Carbon | 3.05 ppm | — | — | No federal limit |
| Total Coliform Bacteria | 1.8 % | — | — | No federal limit |
| Bromoform | 0.65 ppb | — | — | No federal limit |
| Turbidity (highest) | 0.16 NTU | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Zip codes covered
75201 · 75202 · 75203 · 75204 · 75206 · 75207 · 75208 · 75209 · 75210 · 75211 · 75212 · 75214 · 75215 · 75216 · 75217 · 75218 · 75219 · 75220 · 75223 · 75224 · 75226 · 75227 · 75228 · 75229 · 75230 · 75231 · 75232 · 75233 · 75235 · 75236 · 75237 · 75238 · 75240 · 75241 · 75243 · 75246 · 75247 · 75248 · 75249 · 75251 · 75252 · 75253 · 75254 · 75270 · 75287 · 75390
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.