Tap water in Houston, TX — ZIP 77521
4 public water systems serving about 109,140 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 77521
City Of Baytown
PWSID TX1010003 · serves 86,004 ·
surface water
0 health-based / 1 total violations (5 yrs)
· PFAS up to 14.6 ppt — above federal limit
City Of Mont Belvieu
PWSID TX0360017 · serves 12,864 ·
groundwater
5 health-based / 6 total violations (5 yrs)
Lake Mud
PWSID TX1011741 · serves 6,048 ·
surface water
0 health-based / 2 total violations (5 yrs)
· PFAS up to 7.3 ppt
Spring Meadows Mud
PWSID TX1013261 · serves 4,224 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 7.2 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology