County · Massachusetts
Worcester County, Massachusetts: drinking water records
This overview covers 85 ZIP codes and 109 community water systems in Worcester County. It also stands in for 6 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Leominster Water Division MA2153000 | 41,683 | 420 | 1 | 2 | 2.8 ppb |
| Westborough Water Department MA2328000 | 21,567 | 360 | 3 | 1 | 0 ppb |
| Gardner Water Department MA2103000 | 21,381 | 180 | 0 | 1 | 3 ppb |
| Auburn Water District MA2017000 | 12,255 | 360 | 4 | 1 | 1.9 ppb |
| Whitinsville Water Company MA2216000 | 7,899 | 240 | 0 | 1 | 0 ppb |
| Sterling Water Department MA2282000 | 6,715 | 120 | 1 | 1 | 4 ppb |
| Rutland Water Department MA2257000 | 6,025 | 240 | 0 | 4 | 3.1 ppb |
| Sturbridge Water Department MA2287000 | 4,746 | 240 | 0 | 1 | 0 ppb |
| Worcester Dpwp, Water Supply Division MA2348000 | 206,518 | 116 | 1 | 0 | 2 ppb |
| Fitchburg DPW Division of Water Supply MA2097000 | 41,946 | 240 | 3 | 0 | 4 ppb |
| Shrewsbury Water Department MA2271000 | 38,325 | 60 | 5 | 0 | 0 ppb |
| Milford Water Department MA2185000 | 30,379 | 155 | 5 | 0 | 3 ppb |
| Southbridge Water Department MA2278000 | 19,562 | 120 | 1 | 0 | 3 ppb |
| Holden Water Division, DPW MA2134000 | 18,016 | 300 | 5 | 0 | 3.1 ppb |
| Webster Water Department MA2316000 | 17,776 | 120 | 3 | 0 | 2.6 ppb |
| Clinton Water Dept MA2064000 | 15,428 | 120 | 0 | 0 | 0 ppb |
| Northborough Water Department (MWRA) MA2215000 | 13,551 | 120 | 0 | 0 | 1.0 ppb |
| Uxbridge DPW, Water Division MA2304000 | 11,612 | 180 | 3 | 0 | 1.3 ppb |
| Aquarion Water Company, Millbury MA2186000 | 11,368 | 300 | 7 | 0 | 0 ppb |
| Grafton Water District MA2110000 | 10,925 | 240 | 5 | 0 | 8.3 ppb |
| Southborough DPW Water Division (MWRA) MA2277000 | 10,638 | 120 | 0 | 0 | 1 ppb |
| Athol DPW Water Division MA1015000 | 10,587 | 120 | 0 | 0 | 3.6 ppb |
| Blackstone Water Department MA2032000 | 9,463 | 60 | 1 | 0 | 0 ppb |
| Northbridge Water Division MA2216006 | 8,127 | 120 | 0 | 0 | 2 ppb |
| Aquarion Water Company Oxford MA2226000 | 7,384 | 180 | 1 | 0 | 0 ppb |
ZIP reports in Worcester County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 01068, 01331, 01366, 01529, 01531, 01541.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.