Maine / Dischargers /
Town of Orono WPCF
CSO · Maine · Orono
- NPDES permit
- ME0100498
- Outfalls
- 1 with coordinates in the registry
- Receiving waters
- Penobscot River
- Tracked waters
- Penobscot 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). Website check 2026-11-01: orono.org homepage scanned; no CSO links.
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.
1 outfall in the registry
- 003 TREATMENT PLANT · CSO · Penobscot River
Source: EPA ECHO CSO outfall inventory matched to waters (data/outfalls-ne.json).
Event history
| Start | End | Water | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| 2024 | 2025 | Penobscot River, ME | not stated | Annual total | 1.77 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2025, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2023 | 2024 | Penobscot River, ME | not stated | Annual total | 5.39 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2024, published Jun 29, 2025, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2022 | 2023 | Penobscot River, ME | not stated | Annual total | 3.98 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2023, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2021 | 2022 | Penobscot River, ME | not stated | Annual total | 1.1 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2022, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2020 | 2021 | Penobscot River, ME | not stated | Annual total | 905,504 gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2021, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2019 | 2020 | Penobscot River, ME | not stated | Annual total | 1.19 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2020, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2018 | 2019 | Penobscot River, ME | not stated | Annual total | 698,817 gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2019, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2017 | 2018 | Penobscot River, ME | not stated | Annual total | 1.46 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2018, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2016 | 2017 | Penobscot River, ME | not stated | Annual total | 0 gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2017, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2015 | 2016 | Penobscot River, ME | not stated | Annual total | 1.46 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2016, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2014 | 2015 | Penobscot River, ME | not stated | Annual total | 1.32 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2015, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2013 | 2014 | Penobscot River, ME | not stated | Annual total | 0 gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2014, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2012 | 2013 | Penobscot River, ME | not stated | Annual total | 0 gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2013, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2011 | 2012 | Penobscot River, ME | not stated | Annual total | 0 gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2012, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| 2010 | 2011 | Penobscot River, ME | not stated | Annual total | 1.26 million gal | Maine DEP CSO Status Report via Maine DEP Maine Combined Sewer Overflow Status Report (annual; latest = 2025 report, June 2026), record ME0100498:2011, published Jun 29, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
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
| Year | Reported volume |
|---|---|
| 2011 | 1,260,837 gal |
| 2012 | 0 gal |
| 2013 | 0 gal |
| 2014 | 0 gal |
| 2015 | 1,320,000 gal |
| 2016 | 1,461,000 gal |
| 2017 | 0 gal |
| 2018 | 1,460,000 gal |
| 2019 | 698,817 gal |
| 2020 | 1,192,467 gal |
| 2021 | 905,504 gal |
| 2022 | 1,102,236 gal |
| 2023 | 3,981,896 gal |
| 2024 | 5,386,128 gal |
| 2025 | 1,770,882 gal |
Days with a CSO discharge
Days per year.
Show table
| Year | Days with a CSO discharge |
|---|---|
| 2011 | 2 |
| 2012 | 0 |
| 2013 | 0 |
| 2014 | 0 |
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 0 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 6 |
| 2025 | 4 |
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.