Tap water in Houston, TX — ZIP 77070
12 public water systems serving about 88,909 people. PFAS "forever chemicals" have been detected here.
B
Good
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 77070
City Of Houston Willow Chase
PWSID TX1011902 · serves 14,169 ·
groundwater
0 health-based / 0 total violations (5 yrs)
Harris County Mud 230
PWSID TX1012740 · serves 10,404 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 15 ppt
Harris County Wcid 119
PWSID TX1010509 · serves 9,150 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 12.6 ppt
Harris County Mud 468
PWSID TX1013369 · serves 7,944 ·
surface water
0 health-based / 1 total violations (5 yrs)
· PFAS up to 6.8 ppt
Emerald Forest Utility District
PWSID TX1010541 · serves 7,326 ·
groundwater
0 health-based / 2 total violations (5 yrs)
· PFAS up to 4 ppt
Malcomson Road Utility District
PWSID TX1010495 · serves 7,231 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 6.2 ppt
Mills Road Mud
PWSID TX1011107 · serves 6,717 ·
surface water
0 health-based / 1 total violations (5 yrs)
· PFAS up to 3.7 ppt
Lake Forest Utility District
PWSID TX1010494 · serves 6,201 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.3 ppt
Prestonwood Forest Utility District
PWSID TX1010467 · serves 5,940 ·
surface water
0 health-based / 1 total violations (5 yrs)
· PFAS up to 5.6 ppt
Charterwood Mud
PWSID TX1010632 · serves 5,832 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 6.2 ppt
Harris County Mud 18 Heatherwood Hunters
PWSID TX1010512 · serves 4,083 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 6 ppt
Cypress Forest Pud
PWSID TX1010919 · serves 3,912 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5.2 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology