Texas Tap Water Quality by City
EPA UCMR5 PFAS monitoring, MCL / guideline flags, and WaterCheckup grades for 15 cities in Texas. "At Risk" means at least one UCMR analyte flagged above an EPA limit or a regulated PFAS violation on record for that system. "Monitor" means no such flag in UCMR data, but the city profile is medium or high concern. "Safe" means no exceedance flags and a low-concern city profile (still not a guarantee for every tap).
Average water hardness in Texas: 42.6 ppm → Mean of UCMR5 values for 12 tracked Texas cities (not every utility).
Five most common UCMR analytes with detections (>0) in our tracked Texas cities — each city counted once per compound.
| CITY | GRADE | CONTAMINANTS ABOVE LIMIT | POPULATION |
|---|---|---|---|
| Houston Houston Public Works Water | DMONITOR | — | 2.3M |
| San Antonio San Antonio Water System | DMONITOR | — | 1.5M |
| Dallas Dallas Water Utilities | FAT RISK | 32 MCL violations | 1.3M |
| Austin Austin Water Utility | FAT RISK | 21 MCL violation | 960K |
| Fort Worth Fort Worth Water Department | CMONITOR | — | 920K |
| El Paso El Paso Water | FAT RISK | 32 MCL violations | 680K |
| Arlington Arlington Water Utilities | FAT RISK | 11 MCL violation | 390K |
| Corpus Christi Corpus Christi Water Department | DMONITOR | — | 320K |
| Plano Plano Water Utilities | DMONITOR | — | 290K |
| Laredo City of Laredo Utilities | FMONITOR | — | 260K |
| Lubbock Lubbock Water Utilities | FAT RISK | 11 MCL violation | 260K |
| Garland Garland Water Utilities | DMONITOR | — | 240K |
| Irving Irving Water Utilities | FAT RISK | 11 MCL violation | 240K |
| Brownsville Brownsville Public Utilities Board | FAT RISK | 32 MCL violations | 190K |
| McAllen McAllen Water Department | FMONITOR | — | 143K |
County-level grades roll up every WaterCheckup city we map into the same county (via USPS city–county reference data).
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Texas water quality varies by city and water system. UCMR5 reports PFAS and related analytes; the "above limit" column uses the EPA-limit flags bundled with each analyte in our dataset (same basis as city pages). Here, 7 of 15 tracked cities show at least one such flag or a regulated violation count.
SDWIS/City reports: use each city link for full narrative, picks, and EPA Consumer Confidence Report context.
Enter your ZIP code for the full EPA-linked report for your water system — PFAS, violations, and filter recommendations.
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