Tap water in Houston, TX — ZIP 77059
3 public water systems serving about 3,063,374 people. PFAS "forever chemicals" have been detected here.
C
Fair
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 77059
City Of Houston
PWSID TX1010013 · serves 2,970,543 ·
surface water
1 health-based / 1 total violations (5 yrs)
· PFAS up to 42.6 ppt
Clear Lake City Water Authority
PWSID TX1010056 · serves 89,702 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 14.5 ppt — above federal limit
Harris County Wcid 161
PWSID TX1013612 · serves 3,129 ·
surface water
0 health-based / 2 total violations (5 yrs)
· PFAS up to 36.6 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology