DirtyWaterWatch

Maine / Dischargers /

Mechanic Falls Sanitary District

CSO · Maine · Mechanic Falls

NPDES permit
ME0100391
Outfalls
2 with coordinates in the registry
Receiving waters
Little Androscoggin River
Tracked waters
Androscoggin River, ME
Events tracked
0 discharges
Volume reported
no volumes reported

Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 0 event records below, as of 2026-11-02 11:56 UTC.

How it tells the public

No event notification found. Permit requires a permanent 12x18 inch green 'wet weather sewage discharge' sign at each CSO outfall (standard MEPDES CSO special condition) and Ch. 570 annual newspaper notice; annual totals appear only in the DEP CSO Status Report (published each June-July for the prior year).

Source: the project's research on each operator's notification channel (research/<state>/dischargers.json), checked by fetching the operator's pages.

Outfalls

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.

2 outfalls in the registry
  • 002 WATER STREET · CSO · Little Androscoggin River · not on a tracked water
  • 003 PARK/LEWISTON STREET · CSO · Little Androscoggin River · not on a tracked water

Source: EPA ECHO CSO outfall inventory matched to waters (data/outfalls-ne.json).

Event history

Events reported for Mechanic Falls Sanitary District, newest first
StartEnd Water OutfallTypeVolumeSourceLinks
2024 2025 Androscoggin River, ME not stated Annual total 9,930 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2025, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2023 2024 Androscoggin River, ME not stated Annual total 711,433 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2024, published Jun 29, 2025, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2022 2023 Androscoggin River, ME not stated Annual total 232,081 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2023, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2021 2022 Androscoggin River, ME not stated Annual total 131,488 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2022, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2020 2021 Androscoggin River, ME not stated Annual total 63,330 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2021, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2019 2020 Androscoggin River, ME not stated Annual total 379,608 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2020, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2018 2019 Androscoggin River, ME not stated Annual total 616,537 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2019, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2017 2018 Androscoggin River, ME not stated Annual total 194,728 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2018, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2016 2017 Androscoggin River, ME not stated Annual total 603,528 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2017, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2015 2016 Androscoggin River, ME not stated Annual total 927,473 gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2016, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2014 2015 Androscoggin River, ME not stated Annual total 1.01 million gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2015, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2013 2014 Androscoggin River, ME not stated Annual total 1.39 million gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2014, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2012 2013 Androscoggin River, ME not stated Annual total 3.66 million gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2013, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2011 2012 Androscoggin River, ME not stated Annual total 9.64 million gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2012, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

2010 2011 Androscoggin River, ME not stated Annual total 5.03 million gal Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100391:2011, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Full record (older than 180 days, so no page of its own)

This record in the archive list

History

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. 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
20115,033,002 gal
20129,638,035 gal
20133,663,997 gal
20141,385,675 gal
20151,013,807 gal
2016927,473 gal
2017603,528 gal
2018194,728 gal
2019616,537 gal
2020379,608 gal
202163,330 gal
2022131,488 gal
2023232,081 gal
2024711,433 gal
20259,930 gal

Days with a CSO discharge

Days per year.

Show table
Days with a CSO discharge
YearDays with a CSO discharge
201139
201228
201317
201430
201517
201625
201712
201812
201916
202012
20216
202211
202311
202418
20253
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.