Tap water in Olmito, TX — ZIP 78520
2 public water systems serving about 210,201 people. PFAS "forever chemicals" have been detected here.
F
Failing
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 78520
Brownsville Public Utilities Board
PWSID TX0310001 · serves 201,249 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 9.3 ppt — above federal limit
Olmito Wsc
PWSID TX0310026 · serves 8,952 ·
surface water
1 health-based / 1 total violations (5 yrs)
· PFAS up to 10.6 ppt — above federal limit
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology