Tap water in Houston, TX — ZIP 77546
4 public water systems serving about 3,036,395 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 77546
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
City Of Friendswood
PWSID TX0840002 · serves 43,190 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 6.4 ppt
Harris County Mud 55 Heritage Park
PWSID TX1010678 · serves 16,392 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 13.8 ppt
Bryan Co. Rws & Swmd #2
PWSID OK1010604 · serves 6,270 ·
surface water
3 health-based / 9 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology