State rankings
Colorado water-system rankings
Lowest-scoring systems in Colorado
Ranked lowest score first. Population shown for context.
1 WIDEFIELD WSD COLORADO SPRINGS, CO · ~27,640 served 21 2 SNAKE RIVER WD KEYSTONE, CO · ~9,900 served 32 3 BRIGHTON CITY OF BRIGHTON, CO · ~56,304 served 52 4 NORTH WASHINGTON WUA BRIGHTON, CO · ~90 served 60 5 HARTMAN TOWN OF ADMINISTRATIVE CONTACT, CO · ~61 served 60 6 THORNTON CITY OF THORNTON, CO · ~226,465 served 65 7 STONEGATE MD PARKER, CO · ~15,295 served 67 8 MOUNTAIN VILLAGE TOWN OF REDVALE, CO · ~9,700 served 67 9 COLORADO CITY MD COLORADO CITY, CO · ~2,755 served 70 10 GRANADA TOWN OF GRANADA, CO · ~515 served 70 11 MANZANOLA TOWN OF MANZANOLA, CO · ~497 served 70 12 FRUITLAND DOMESTIC WC HOTCHKISS, CO · ~335 served 70 13 PRAIRIE VIEW RANCH WD WIGGINS, CO · ~140 served 70 14 WALSENBURG CITY OF WALSENBURG, CO · ~3,230 served 85 15 LAS ANIMAS CITY OF LAS ANIMAS, CO · ~2,139 served 85 16 GARDEN VALLEY COLORADO SPRINGS, CO · ~900 served 85 17 SPRING HILL MHP DENVER, CO · ~764 served 85 18 COLORADO MTN COLLEGE SVC GLENWOOD SPRINGS, CO · ~715 served 85 19 COUNTRYSIDE ESTATES MHC PUEBLO, CO · ~502 served 85 20 EUREKA WC ROCKY FORD, CO · ~498 served 85 21 MONTEZUMA CNTY WD NO 1 CORTEZ, CO · ~490 served 85 22 VALLEY MAINT CORP NO 1 COLORADO SPRINGS, CO · ~470 served 85 23 ST MARYS GLACIER WSD WHEAT RIDGE, CO · ~451 served 85 24 AGUILAR TOWN OF AGUILAR, CO · ~447 served 85 25 BIG ELK MEADOWS WA FT MORGAN, CO · ~405 served 85
Highest-scoring large systems in Colorado
Systems serving 10,000+ people with the best scores.
1 DENVER WATER BOARD DENVER, CO · ~1,287,000 served 100 2 AURORA CITY OF AURORA, CO · ~533,407 served 100 3 COLORADO SPRINGS UTILITIES COLORADO SPRINGS, CO · ~464,111 served 100 4 WESTMINSTER CITY OF WESTMINSTER, CO · ~202,078 served 100 5 FT COLLINS CITY OF FORT COLLINS, CO · ~179,901 served 100 6 ARVADA CITY OF ARVADA, CO · ~171,610 served 100 7 BOULDER CITY OF BOULDER, CO · ~166,080 served 100 8 GREELEY CITY OF GREELEY, CO · ~132,310 served 100
Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.