💧 ZIP Water Report

Tap water in Houston, TX — ZIP 77494

17 public water systems serving about 126,245 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 77494

City Of Katy
PWSID TX1010017 · serves 25,253 · groundwater
0 health-based / 1 total violations (5 yrs)
A
Fort Bend County Mud 142
PWSID TX0790429 · serves 11,595 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 9.1 ppt — above federal limit
C
Fort Bend County Mud 58
PWSID TX0790458 · serves 10,629 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 5.2 ppt
A
Fort Bend County Mud 151
PWSID TX0790443 · serves 10,233 · groundwater
0 health-based / 0 total violations (5 yrs)
A
Harris-Fort Bend Counties Mud 3
PWSID TX1013365 · serves 9,297 · groundwater
0 health-based / 5 total violations (5 yrs)
B
Fort Bend County Mud 35
PWSID TX0790433 · serves 6,297 · groundwater
0 health-based / 0 total violations (5 yrs) · PFAS up to 6.3 ppt
A
Cinco Mud 14
PWSID TX0790422 · serves 6,192 · groundwater
0 health-based / 0 total violations (5 yrs)
A
Cinco Southwest Mud 4
PWSID TX0790522 · serves 6,093 · surface water
0 health-based / 0 total violations (5 yrs)
A
Cinco Southwest Mud 2
PWSID TX0790481 · serves 5,496 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 5.7 ppt
A
Fort Bend County Mud 34
PWSID TX0790200 · serves 5,367 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 7.3 ppt
A
Fort Bend County Mud 57
PWSID TX0790455 · serves 5,335 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 20.5 ppt
A
Cinco Southwest Mud 3 Daycare
PWSID TX0790521 · serves 5,187 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 3.4 ppt
A
Harris Fort Bend Counties Mud 5
PWSID TX0790347 · serves 4,641 · groundwater
0 health-based / 0 total violations (5 yrs)
A
United Water System
PWSID LA1099009 · serves 4,446 · groundwater
10 health-based / 10 total violations (5 yrs)
F
Cinco Mud 9
PWSID TX0790307 · serves 3,828 · groundwater
0 health-based / 0 total violations (5 yrs)
A
Harris Fort Bend Counties Mud 1
PWSID TX0790216 · serves 3,812 · groundwater
0 health-based / 0 total violations (5 yrs)
A
Fort Bend County Mud 124
PWSID TX0790412 · serves 2,544 · groundwater
0 health-based / 0 total violations (5 yrs)
A

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology