Massachusetts sewage discharges in 2023

6,471 records of sewage discharges and water advisories in Massachusetts dated in 2023, newest first, 2,567 earlier versions or duplicates included and marked. Each record keeps the source's own times and wording; a record from the last six months, or one still in effect, also has a page of its own.

By type: Combined sewer overflow (CSO)5,809 · Blended discharge408 · Sanitary sewer overflow (SSO)197 · Treatment bypass57

By source: CITY OF FALL RIVER (MassDEP sewage notification portal)1,125 · CITY OF NEW BEDFORD (MassDEP sewage notification portal)1,032 · SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal)987 · LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal)530 · CITY OF HOLYOKE (MassDEP sewage notification portal)519 · CITY OF CHICOPEE (MassDEP sewage notification portal)411 · CITY OF HAVERHILL (MassDEP sewage notification portal)385 · BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal)251 · 39 more

2023 in other states: Connecticut, Maine, New Hampshire, New York, Pennsylvania, Rhode Island, Vermont.

Source: the agencies, sewer operators and EPA records named on each row and on the Sources page. Updated 2026-11-02 21:26 UTC.

Massachusetts sewage discharges in 2023

By month