26 Maryland water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Washington Suburban Sanitary Commission1,900,000 people · 24 results
- City of Hagerstown92,200 people · 11 results
- Waldorf - Charles County Dpw84,296 people · 15 results
- Crofton-Odenton62,986 people · 2 results
- Fort George G. Meade62,234 people · 7 results
- City of Frederick54,000 people · 15 results
- City of Rockville52,000 people · 10 results
- New Design - Frederick County49,200 people · 14 results
- Lexington Park43,030 people · 8 results
- City of Westminster35,256 people · 18 results
- City of Annapolis35,000 people · 8 results
- City of Salisbury30,343 people · 13 results
- Town of Ocean City30,000 people · 7 results
- City of Cumberland27,039 people · 6 results
- City of Bowie25,000 people · 8 results
- Freedom District24,867 people · 14 results
- Broad Creek23,179 people · 2 results
- Patuxent Naval Air Station (Navfac-Wash)22,000 people · 10 results
- Easton Utilities17,357 people · 9 results
- Town of Hampstead6,600 people · 1 results
- Town of Poolesville5,400 people · 7 results
- Town of Manchester4,954 people · 1 results
- Town of North Beach3,000 people · 3 results
- Bel Air - Pinto Distribution System2,614 people · 3 results
- Town of Federalsburg2,450 people · 3 results
- Wakefield Valley2,436 people · 3 results
Other districts with a few results read
Search these in the water lookup to see their numbers.
- Howard County D.P.W. Distribution · 286,158 people
- Town of North East · 8,600 people
- City of Brunswick · 7,312 people
- Eastern Region Allegany Distrib. System · 5,703 people
- Midland-Lonaconing · 5,000 people
- Town of Charlestown · 3,791 people
- Country Lakes · 3,016 people
- Town of Emmitsburg · 2,400 people
- Town of Williamsport Distribution System · 2,400 people
- Mountain Hill Water Company · 2,154 people