Brownsville, TX Water Quality Report

Is Brownsville tap water safe? See PFAS and lead contamination levels for Brownsville, Texas. Compare to EPA limits and get filter recommendations.

Quick Answers

Is Brownsville tap water safe to drink? Brownsville water has high PFAS contamination. EPA UCMR5 testing detected a peak level of 77 ppt, significantly above the EPA's 4 ppt enforceable limit. A reverse osmosis or certified PFAS filter is strongly recommended.

What contaminants are in Brownsville water? Top PFAS compounds detected in Brownsville water: lithium (77 ppt), PFPeA (0.01 ppt), PFHxA (0.01 ppt). See the full table for all monitored contaminants and comparison to EPA limits.

What filter should I use in Brownsville? Reverse osmosis removes 90%+ of PFAS, lead, and arsenic. NSF-53 certified pitcher and faucet filters (ZeroWater, Clearly Filtered, LifeStraw) work for smaller households. Skip standard Brita filters for PFAS removal.

Brownsville Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in Brownsville drinking water. Recent monitoring found a peak level of 77 ppt across 2 water systems, representing an average of 9.74 ppt across 8 detected compounds.

Contamination Level: HIGH – High contamination – multiple PFAS compounds detected at levels significantly above EPA safety thresholds.

Top Detected Compounds

  • lithium: 77 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
  • PFPeA: 0.01 ppt
  • PFHxA: 0.01 ppt
  • PFBA: 0.01 ppt
  • PFOS: 0.01 ppt

Lead in Brownsville Water

EPA Lead and Copper Rule testing has recorded 14 lead samples for Brownsville water systems, with a 90th-percentile high of 0.00142 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.

EPA Violations in Brownsville

Brownsville public water systems have 2 health-based EPA Safe Drinking Water Act violations on record, including Haloacetic Acids (HAA5), Surface Water Treatment Rule. Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.

About the Data

These figures come from the EPA's Unregulated Contaminant Monitoring Rule 5 (UCMR5) testing program, 2023-2025. UCMR5 is the most comprehensive national drinking water survey in US history, covering 66,000+ public water systems. Population of Brownsville: approximately 189,123.

ZIP Codes Served

78520, 78521, 78522, 78523, 78526

What Brownsville Residents Should Do

  1. Enter your exact ZIP code at knowyourexposure.com for address-level data
  2. Install an NSF/ANSI 58 reverse osmosis filter (removes 94-99% of PFAS)
  3. If you're in a high-exposure group (pregnant, young children), consider a PFAS home test kit
  4. Review your utility's Consumer Confidence Report (CCR) annually