Pennsylvania / Waters /
Octoraro Lake
Reservoir in Pennsylvania, near Colerain Township
Current status
A discharge is reported as ongoing, a post-discharge period applies, or an official advisory is listed. Open the report for its source, dates and advice. This status since . Why this status, and its source
Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.
Square boat markers mark boat launches listed by OpenBoatLaunch.
Bookmark this water page and check it before each trip · Report a missing notice or error
About this status
Why this status: Discharge or advisory reported: official advisory.
Why we use this rule: An official advisory is listed. We show it while the authority keeps it in place; an old or missing update does not mean the advisory was lifted.
Source: https://www.pa.gov/agencies/health/programs/environmental-health/habs-dashboard. How long each status lasts, and why
Source: Pennsylvania Department of Health HAB dashboard, record octoraro-reservoir-20260514, updated by the source Oct 21, 2026, 9:45 AM EDT, retrieved 2026-11-02 21:20 UTC · Read the original notice
Updated .
Reports behind this status
- Discharge or advisory reported Cyanobacteria advisory (harmful blue-green algae) · operator not stated · outlet not stated · May 14, 2026, 8:30 AM EDT to still listed as in effect · volume not reported · Official advisory in effect, current rule period ends Nov 4, 2026, 8:45 AM EST
Source: Pennsylvania Department of Health HAB dashboard, record octoraro-reservoir-20260514, updated by the source Oct 21, 2026, 9:45 AM EDT, retrieved 2026-11-02 21:20 UTC · Read the original notice
Advice in the reports
Pennsylvania Department of Health HAB dashboard · May 14, 2026 · Current status: sets this water's status now
“Advisory (Yellow) (highest Department of Health response level in this period)”
The last 90 days
- Discharge or advisory reported: to the latest update 2 reports: Pennsylvania Department of Health HAB dashboard 2
Show records
The records are also in the report table on this page.
Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-02 21:26 UTC.
Reported discharges over time
- Hours with a discharge or advisory status on the Octoraro Lake in Pennsylvania, last 12 months4,138Reported on the Octoraro Lake in Pennsylvania: 0 · Arriving from outfalls upstream, estimated: 0December 2025 to November 2026Red hours by the map's rules: each discharge to its reported end plus the state's post-discharge period; overlapping hours count once.
- 2026 season with a discharge or advisory status on the Octoraro Lake in Pennsylvania93%May to October 2026Share of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.
- Records behind the last-90-days strip for the Octoraro Lake in Pennsylvania2Reported on the Octoraro Lake in Pennsylvania: 2 · Arriving from outfalls upstream, estimated: 0last 90 daysEvery distinct record the strip lists for its red, yellow and unresolved hours, notices and unresolved reports included; counted as the strip counts them.
Hours with a discharge or advisory status per month
Hours when this water had a discharge or advisory status under DirtyWaterWatch rules.
- Discharge or advisory reported
- No tracked source for this period
- Incomplete source coverage
No tracked source covers January 2022 to March 2026.
Source: pa-doh-habs. Records cover April 7, 2026 to November 2, 2026.
Show table
| Month | Hours with a discharge or advisory status | Hours from post-discharge periods | Hours from official advisories only | Hours in the month | Coverage |
|---|---|---|---|---|---|
| January 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2022 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2023 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2024 | 0 | 0 | 0 | 696 | No tracked source for this period |
| March 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2025 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2026 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2026 | 0 | 0 | 0 | 720 | Incomplete source coverage |
| May 2026 | 424 | 0 | 424 | 744 | |
| June 2026 | 720 | 0 | 720 | 720 | |
| July 2026 | 744 | 0 | 744 | 744 | |
| August 2026 | 744 | 0 | 744 | 744 | |
| September 2026 | 720 | 0 | 720 | 720 | |
| October 2026 | 744 | 0 | 744 | 744 | |
| November 2026 | 42 | 0 | 42 | 42 |
Hours with a discharge or advisory status per year
Hours with a discharge or advisory status each year under DirtyWaterWatch rules; 2026 to date.
- Discharge or advisory reported
- Incomplete source coverage
Source: pa-doh-habs. Records cover April 7, 2026 to November 2, 2026.
Show table
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2026 | 4,138 | 56.4% | Incomplete source coverage |
How these charts are counted
We count each discharge once. Where a source publishes notices and confirmed reports, we use confirmed reports for an operator's month when available; otherwise we use notices. We combine revisions and exclude duplicate state reports copied by the U.S. Environmental Protection Agency (EPA). Monthly and yearly totals appear separately. Status hours follow this site's rules. Shaded gaps mean missing coverage, not zero discharges.
- pa-doh-habs: records from April 7, 2026 to the latest update
Reports linked to Octoraro Lake
| Start | End | Sewer operator | Outlet | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Aug 24, 2026, 10:55 AM EDT | still listed as in effect | not stated | Not provided | Cyanobacteria advisory (harmful blue-green algae) | volume not reported | Pennsylvania Department of Health HAB dashboard, record octoroaro-lake-20260824, updated by the source Aug 24, 2026, 10:55 AM EDT, retrieved 2026-11-02 21:20 UTC · Read the original notice | Read report: Cyanobacteria advisory (harmful blue-green algae), , Aug 24, 2026, 10:55 AM EDT · Map |
| May 14, 2026, 8:30 AM EDT | still listed as in effect | not stated | Not provided | Cyanobacteria advisory (harmful blue-green algae) | volume not reported | Pennsylvania Department of Health HAB dashboard, record octoraro-reservoir-20260514, updated by the source Oct 21, 2026, 9:45 AM EDT, retrieved 2026-11-02 21:20 UTC · Read the original notice | Read report: Cyanobacteria advisory (harmful blue-green algae), , May 14, 2026, 8:30 AM EDT · Map |
All reports in Pennsylvania by year: 2026 (2 here)
Wastewater outlets on this water
Outfall: a pipe or outlet where wastewater enters a water body.
No wastewater outlet in our records is linked to this water.
Boat launches
- Octoraro Carry-in Access, Colerain Township · Carry-in launch (canoe and kayak)
Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Octoraro Lake on OpenBoatLaunch
Nearby waters
- Chambers Lake, PA No current status shown about 29 km away
- Struble Lake, PA No current status shown about 37 km away
- Marsh Creek Reservoir, PA No current status shown about 40 km away
- Speedwell Forge Lake, PA No current status shown about 50 km away
- Middle Creek Reservoir, PA No current status shown about 54 km away
Sources covering this water
- Pennsylvania Department of Health HAB dashboard · Latest check succeeded · Last successful check: 2026-11-02 21:20 UTC
2 records linked to this water. Updated .