PlainWater

Public Water Systems

143,076 active public water systems, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.

System Name Location Population Violations PFAS
Quebrada Arenas San Lorenzo, PR 4,451 0 -
Mifflintown Muni Auth Mifflintown, PA 4,450 321 Clean
Slatington Borough Water Sys Slatington, PA 4,450 112 Clean
Columbia Falls City Of Columbia Falls, MT 4,450 99 Clean
Goodland, City Of Goodland, KS 4,450 119 Clean
Town of Elizabeth Elizabeth, IN 4,450 87 Clean
Harris County MUD 104 Houston, TX 4,449 1 Detected
United Water System Arnaudville, LA 4,446 209 Clean
Clay Road MUD Houston, TX 4,443 4 Detected
Town of Bar Harbor- Water Division Bar Harbor, ME 4,443 5 Detected
Rocky Ford City Of Rocky Ford, CO 4,443 337 Detected
Baldwin Waterworks Baldwin, WI 4,440 19 Clean
Glen Canyon Nra Wahweap Page, AZ 4,439 403 Detected
Atkins Water System Atkins, AR 4,439 88 Clean
Pearl River Central W/a-Henley Field McNeill, MS 4,438 495 Clean
Northwest Clay County Utility Moss, TN 4,437 80 Detected
Wayland Wayland, MI 4,435 25 Clean
Indiana American Water - Sheridan Greenwood, IN 4,435 9 -
Waverly City PWS Waverly, OH 4,433 79 Detected
Dawsonville Dawsonville, GA 4,433 37 -
Belfair Water District 1 Belfair, WA 4,432 151 -
Narragansett Water Dept-North End Narragansett, RI 4,432 130 Detected
South Side U.d. #1 Gordonsville, TN 4,431 12 Clean
Fredericktown PWS Fredricktown, MO 4,429 130 Clean
City of Three Rivers Three Rivers, TX 4,428 124 Detected
Many Water System Many, LA 4,428 122 Clean
Cawood Water District Cawood, KY 4,428 121 Clean
Canaan Utilities Canaan, IN 4,428 12 Detected
West Cape May Water Dept West Cape May, NJ 4,427 43 Clean
Hollister PWS Hollister, MO 4,426 33 Clean
Palmyra Water Works Paoli, IN 4,425 73 Detected
Friendship Water Works Tallassee, AL 4,425 108 Detected
Lafayette, City Of Lafayette, OR 4,423 270 Clean
Red Springs, Town Of Red Springs, NC 4,423 99 Clean
California PWS California, MO 4,423 36 Clean
McCall City Of McCall, ID 4,423 205 Clean
Montgomery County MUD 19 Houston, TX 4,422 12 Clean
Upton Dpw Water/Wastewater Division Upton, MA 4,420 169 Clean
Buffalo, City Of Buffalo, WY 4,419 45 Clean
Sws-Landrum WTP (Sc4210003) Spartanburg, SC 4,419 36 Clean
Gcwsd Kilsock Water Sys (Sc2220002) Pawleys Island, SC 4,417 6 Clean
North River/Mill Creek Water Service Dis Charlotte, NC 4,417 739 -
Palomar Observatory Palomar Mountain, CA 4,416 21 -
South Marengo Co Water & Fire Pro Auth Linden, AL 4,416 17 Detected
Lakewood Campground (Sc2660049) Myrtle Beach, SC 4,415 20 Clean
South Bainbridge Poulsbo, WA 4,414 660 -
Harris County MUD 397 Houston, TX 4,413 1 Clean
Town of Perryville Perryville, MD 4,413 196 Clean
Sullivan County PWSD 1 Milan, MO 4,412 2 Clean
City of Justin Justin, TX 4,409 24 Detected
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