Croton Falls Reservoir
Reservoir in New York, near Carmel and Southeast
Current status
An official advisory about an algal bloom (cyanobacteria) is listed for this water. 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.
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About this status
Algal bloom advisory: official algal bloom advisory listed; shown while the authority keeps it in place
Source: NYS DEC Harmful Algal Blooms Program (NYHABS) via DEC NYHABS current HAB reports (Current_HAB_Reports_DIL / Current_HAB_Reports_7_3_19) and Archived_HAB_Reports, record 17ef0af7-8b1…, updated by the source Oct 21, 2026, 8:00 AM EDT, retrieved 2026-11-03 14:41 UTC · Original notice · Updated
Reports behind this status
Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.
| When | Report | Status |
|---|---|---|
| NYS DEC Harmful Algal Blooms Program (NYHABS) · Algae advisory · volume not reported report · notice · map | to Nov 4, 7:00 AM |
Sources: DEC NYHABS current HAB reports (Current_HAB_Reports_DIL / Current_HAB_Reports_7_3_19) and Archived_HAB_Reports, retrieved 2026-11-03 14:41 UTC. A report's record id and times show when you hover or focus its "report" link.
Advice in the reports
NYS DEC Harmful Algal Blooms Program (NYHABS) · Oct 20, 2026 · Current status: sets this water's status now
“Learn how to Know it, Avoid it, Report it at https://www.dec.ny.gov/chemical/77118.html?”
The last 90 days
Algal bloom advisories: 1 period
- Algal bloom advisory: to the latest update 1 report: NYS DEC Harmful Algal Blooms Program (NYHABS) 1
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 2026-11-03 14:48 UTC.
Reported discharges over time
- Hours with a discharge or advisory status on the Croton Falls Reservoir in New York, last 12 months333Reported on the Croton Falls Reservoir in New York: 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 Croton Falls Reservoir in New York93%May to October 2026; incomplete source coverageShare 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 Croton Falls Reservoir in New York1Reported on the Croton Falls Reservoir in New York: 1 · 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 September 2026.
Source: ny-dec-habs. Records cover October 19, 2026 to November 3, 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 | No tracked source for this period |
| May 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2026 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2026 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2026 | 274 | 0 | 274 | 744 | Incomplete source coverage |
| November 2026 | 59 | 0 | 59 | 59 |
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: ny-dec-habs. Records cover October 19, 2026 to November 3, 2026.
Show table
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2026 | 333 | 4.5% | 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.
- ny-dec-habs: records from October 19, 2026 to the latest update
Reports linked to Croton Falls Reservoir
Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.
| When | Report | Status |
|---|---|---|
| NYS DEC Harmful Algal Blooms Program (NYHABS) · Algae advisory · volume not reported report · notice · map | to Nov 4, 7:00 AM |
Sources: DEC NYHABS current HAB reports (Current_HAB_Reports_DIL / Current_HAB_Reports_7_3_19) and Archived_HAB_Reports, retrieved 2026-11-03 14:41 UTC. A report's record id and times show when you hover or focus its "report" link.
All reports in New York by year: 2026 (1 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
No public boat launch is listed in our records for this water.
Nearby waters
- Canopus Lake, NY No current status shown about 17 km away
- Ridgefield Brook, CT No current status shown about 17 km away
- Still River, CT No current status shown about 20 km away
- East Swamp Brook, CT No current status shown about 23 km away
- Limekiln Brook, CT No current status shown about 24 km away
Sources covering this water
- DEC NYHABS current HAB reports (Current_HAB_Reports_DIL / Current_HAB_Reports_7_3_19) and Archived_HAB_Reports · Latest check succeeded · Last successful check: 2026-11-03 14:41 UTC
1 record linked to this water. Updated .