DirtyWaterWatch

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Sewage discharges in Maine

33 waters tracked: 0 red, 0 yellow, 0 unresolved, 33 with no current report, as of Nov 2, 2026, 6:56 AM EST. 0 discharges reported in the last 30 days.

Source: DirtyWaterWatch statuses from the 2 feeds listed under Coverage below, as of 2026-11-02 11:56 UTC.

Source: water outlines from OpenBoatLaunch and OpenStreetMap contributors (ODbL); outfalls from EPA ECHO and the state outfall layers; modeled reaches computed by DirtyWaterWatch from USGS NLDI, NHDPlus and the nearest USGS gauge (Jobson 1996); basemap OpenFreeMap and OpenMapTiles.

No current report No current report: 33 waters

Dischargers

Coverage

What the authority says about the period after a discharge

No stated period: a water is red only while the discharge is reported ongoing. Basis: “No authority states a post-discharge period; Maine Healthy Beaches rainfall advisories say avoid contact for at least 24-48 h after rain ceases (applied to rain_advisory records, not discharges)”

Source: rules.json red.by_state.ME (research/me/report.md).

How long a water stays coloured, in every state

Feeds we read

18 other sources considered for Maine are listed on the sources page.

Discharges in Maine over the years

Reported yearly totals: Maine DEP CSO status reports (annual totals)

Maine DEP reports one total per community and year (all of its CSO outfalls); it is shown in full on each water the community's outfalls reach. Event-days: calendar days with any CSO discharge in the community. Sum of 30 reporting dischargers. Source: Maine DEP CSO status reports (annual totals). Covered 2011-01-01 to 2025-12-31.

Reported volume

Gallons per year.

Show table
Reported volume
YearReported volume
20111,212,991,196 gal
20121,288,104,734 gal
2013472,341,866 gal
2014874,838,678 gal
2015514,184,353 gal
2016548,577,356 gal
2017294,507,766 gal
2018496,447,825 gal
2019458,785,859 gal
2020359,840,335 gal
2021346,742,558 gal
2022305,344,353 gal
2023744,758,856 gal
2024532,550,698 gal
2025152,784,906 gal

Community event-days (summed)

Community-days per year.

Show table
Community event-days (summed)
YearCommunity event-days (summed)
2011576
2012542
2013439
2014527
2015340
2016372
2017269
2018325
2019322
2020278
2021262
2022295
2023275
2024252
2025143
How these charts are counted

Discharge events are counted once: where a source publishes both public notices and verified reports (MassDEP, Vermont DEC), a discharger's month with any verified report counts its verified reports only, and other months count notices. Revisions are folded into the record they revise, and EPA copies of a state report are not counted twice. Monthly and yearly totals (Maine DEP, EPA discharge monitoring reports, Portsmouth) are shown on their own and never added to the event counts. Hours under advisory follow the map's red rules. A muted band marks periods no source covers: a gap there is missing data, not a quiet month.

Discharges in the last 30 days

None reported in the last 30 days.