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New York / Sewer operators /

Tonawanda (T) SD #2 WWTP

Wastewater treatment plant · New York

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.

No outlet locations are in our records for this operator. Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
NY0026395
Wastewater outlets
None with locations in our records
Waters listed as receiving wastewater
not recorded
Tracked waters
Ellicott Creek, NY, Twomile Creek, NY
Discharge records counted
26 records · latest
Total reported volume in these records
628,500 gallons across the 19 records that give a volume (7 without one)

These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.

Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-03 11:12 UTC.

Public notices and alerts

We do not list an alert service for this operator yet. Check its website.

Source: Tonawanda (T) SD #2 WWTP's public notice and alert pages and the state's notification records.

Report a missing notice or error

Wastewater outlets

Outfall: a pipe or outlet where wastewater enters a water body.

Reports and advisories

Treatment bypass: wastewater skips one or more treatment steps.

Reports linked to Tonawanda (T) SD #2 WWTP, newest first
WhenReportStatus
Ellicott Creek · Report · 20,000 gallons report · notice · mapongoing
Ellicott Creek · Report · 46,000 gallons report · notice · mapongoing
to 10:00 PMTwomile Creek · Report · 28,000 gallons report · notice · mapended
Ellicott Creek · Report · 120,000 gallons report · notice · mapongoing
to Jul 22, 11:01 AMEllicott Creek · Report · 24,000 gallons in all mapended
to Jun 19, 6:00 AMEllicott Creek · Report · 92,000 gallons in all mapended
Ellicott Creek · Report · 120,000 gallons report · notice · mapongoing
Ellicott Creek · Report · 7,900 gallons report · notice · mapongoing
to May 24, 5:00 AMEllicott Creek · Report · 15,800 gallons in all mapended
to 2:00 AMTwomile Creek · Report · 19,800 gallons in all mapended
Ellicott Creek · Report · 46,000 gallons report · notice · mapongoing
to 7:05 PMEllicott Creek · Bypass · volume in each report mapended
to Apr 26, 1:22 AMEllicott Creek · Bypass · volume in each report mapended
to Apr 19, 12:00 PMEllicott Creek · Report · 15,800 gallons in all mapended
to Apr 16, 1:00 AMEllicott Creek · Report · 7,900 gallons report · notice · mapended
Twomile Creek · Report (earlier version) · 9,900 gallons report · notice · mapongoing
to 3:59 AMTwomile Creek · Report · 9,900 gallons report · notice · mapended
to 4:59 PMEllicott Creek · Report · 92,000 gallons in all mapended

Sources: DEC SPRTK workbook 'SPRTK_Data.xlsx' and older 'Sewage_Discharge_Reports.xlsx' (2013-2020), retrieved 2026-11-02 20:40 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

Showing the latest 26 records of 43 records.See them all with filters.

All reports in New York by year: 2026 (41 from Tonawanda (T) SD #2 WWTP) · 2025 (2 from Tonawanda (T) SD #2 WWTP)

Other sewer operators on these waters

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Grey: no current status on the water outline. Purple hatching: source update overdue.
  • End not confirmed: to
    2 reports: Ellicott Creek 2
    Show records

    The records are also in the report table on this page.

  • Discharge or advisory reported: to
    1 report: Ellicott Creek 1
    Show records

    The records are also in the report table on this page.

  • End not confirmed: to
    2 reports: Ellicott Creek 2
    Show records

    The records are also in the report table on this page.

  • Discharge or advisory reported: to
    1 report: Ellicott Creek 1
    Show records

    The records are also in the report table on this page.

  • End not confirmed: to
    1 report: Ellicott Creek 1
    Show records

    The records are also in the report table on this page.

  • Discharge or advisory reported: to
    1 report: Ellicott Creek 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 11:12 UTC.

Reported discharges over time

  • Discharges reported by Tonawanda (T) SD #2 WWTP, last 12 months26December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Tonawanda (T) SD #2 WWTP, last 12 months30December 2025 to November 2026A day counts once however many discharges were under way on it. Verified reports where available, else notices; revisions and duplicates counted once.
  • Hours with a discharge or advisory status from Tonawanda (T) SD #2 WWTP's reports, last 12 months1,278December 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 (Tonawanda (T) SD #2 WWTP)23%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.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.

Reported discharges per month

26 reported discharges, January 2022 to November 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other

Source: ny-dec-sprtk. Records cover January 1, 2022 to November 3, 2026.

Show table

Hours with a discharge or advisory status per month

Hours when a water had a discharge or advisory status from this sewer operator's reports, under DirtyWaterWatch rules.

  • Discharge or advisory reported

12 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 3, 2026.

Show table

Days with a reported discharge per month

A day counts when any counted discharge was under way on it, from its start to its reported end in Eastern Time; a report with no end counts its start day.

Source: ny-dec-sprtk. Records cover January 1, 2022 to November 3, 2026.

Show table

Reported discharges per year, 2021 to 2026

26 reported discharges, 2021 to 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other
  • Incomplete source coverage
Limited records

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 3, 2026.

Show table

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 19 reports that gave a volume as a number (7 did not).

  • Incomplete source coverage
Limited records

7 of 26 discharge reports gave no volume as a number; only numbers are summed.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 3, 2026.

Show table

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
Limited records

12 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 3, 2026.

Show table

Share of the May to October season with a discharge or advisory status

Share of the hours from May 1 to October 31 with a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported
  • Season with incomplete source coverage

Seasons with incomplete source coverage: 2021. The share is of the hours a source covered. 12 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 3, 2026.

Show table

Reported discharges by calendar month, all years

Every counted discharge report, by the calendar month it began.

Months are summed over every year a tracked source covers; the table gives the number of years behind each month.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 3, 2026.

Show table
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-sprtk: records from August 11, 2021 to the latest update