Public Water Systems
1,599 active public water systems in MA, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Harwich Water Department | Harwich, MA | 39,144 | 6 | Clean |
| Braintree Water and Sewer Dept. | Braintree, MA | 39,143 | 98 | Detected |
| Yarmouth Water Department | West Yarmouth, MA | 38,900 | 54 | Detected |
| Shrewsbury Water Department | Shrewsbury, MA | 38,325 | 25 | Detected |
| Chelsea Water Dept. (Mwra) | Chelsea, MA | 38,319 | 34 | Clean |
| Gloucester Public Utility Division | Gloucester, MA | 37,440 | 171 | Clean |
| Natick Water and Sewer Division | Natick, MA | 37,006 | 146 | Detected |
| Mashpee Water District | Mashpee, MA | 36,922 | 8 | Detected |
| Andover Water Dept | Andover, MA | 36,569 | 7 | Detected |
| Watertown Water Dept. (Mwra) | Watertown, MA | 35,329 | 19 | Clean |
| Hyannis Water System, Town of Barnstable | Hyannis, MA | 35,000 | 87 | Detected |
| Brewster Water Department | Brewster, MA | 35,000 | 29 | Clean |
| Randolph Water Department | Randolph, MA | 34,362 | 27 | Detected |
| Bluedrop Water @ Randolph Dpw | North Randolph, MA | 34,362 | 7 | - |
| Bluedrop Water @ St Bernadette Church | North Randolph, MA | 34,362 | 0 | - |
| Lexington Water Dept. (Mwra) | Lexington, MA | 34,074 | 17 | Clean |
| Marshfield Water Department | Marshfield, MA | 34,000 | 109 | Detected |
| Abington/Rockland Joint Wtr. Works | Rockland, MA | 33,647 | 48 | Detected |
| Franklin Water Department | Franklin, MA | 33,399 | 44 | Detected |
| Needham Water Dept | Needham, MA | 33,130 | 118 | Detected |
| Tewksbury Water Department | Tewksbury, MA | 31,342 | 30 | Detected |
| North Andover Water Dept | North Andover, MA | 30,915 | 56 | Clean |
| Milford Water Department | Milford, MA | 30,379 | 108 | Detected |
| Chatham Water Department | Chatham, MA | 30,000 | 85 | Clean |
| Norwood Water Dept. (Mwra) | Norwood, MA | 29,909 | 25 | Clean |
| Mattapoisett River Valley W.D. | Mattapoisett, MA | 29,600 | 4 | Clean |
| Northampton Water Division | Northampton, MA | 29,571 | 100 | Clean |
| Wellesley Water Division | Wellesley, MA | 29,550 | 15 | Detected |
| Melrose Water Division (Mwra) | Melrose, MA | 29,357 | 45 | Clean |
| Stoughton Water Department | Stoughton, MA | 29,281 | 45 | Detected |
| North Attleboro Water Dept | North Attleborough, MA | 28,863 | 146 | Detected |
| West Springfield Dpw Water Division | West Springfield, MA | 28,835 | 52 | Clean |
| Chelmsford Water District | Chelmsford, MA | 28,750 | 12 | Detected |
| Bluedrop Water Vending N Att Dpw | North Attleborough, MA | 28,712 | 0 | - |
| Agawam Water Department | Agawam, MA | 28,692 | 26 | Clean |
| Bridgewater Water Department | Bridgewater, MA | 28,633 | 55 | Detected |
| Milton Water Dept. (Mwra) | Milton, MA | 28,630 | 13 | Clean |
| Danvers Water Dept. | Middleton, MA | 28,087 | 56 | Detected |
| Wannacomet Water Company | Nantucket, MA | 27,703 | 197 | Clean |
| Reading Water Department (Mwra) | Reading, MA | 27,358 | 7 | Clean |
| Belmont Water Dept. (Mwra) | Belmont, MA | 27,295 | 11 | Clean |
| Wakefield Water Dept | Wakefield, MA | 27,090 | 113 | Detected |
| Saugus Water Dept. (Mwra) | Saugus, MA | 27,082 | 26 | Clean |
| Burlington Water Dept | Burlington, MA | 26,680 | 278 | Detected |
| Dracut Water Supply District | Dracut, MA | 25,789 | 114 | Detected |
| Dartmouth Water Division | Dartmouth, MA | 24,630 | 38 | Detected |
| Walpole Water Dept | Walpole, MA | 24,070 | 67 | Detected |
| Oak Bluffs Water District | Oak Bluffs, MA | 24,000 | 167 | Detected |
| Mansfield Water Division | Mansfield, MA | 23,289 | 26 | Detected |
| Stoneham Water Dept (Mwra Supply) | Stoneham, MA | 23,244 | 33 | Clean |