New York wastewater permits expiring in 2026
39 NPDES permits · 126 MGD combined average flow
39 publicly owned wastewater treatment plants in New York hold NPDES permits that expire during 2026, issued by New York State Department of Environmental Conservation. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|
| Cedar Creek WPCP | Wantagh | 63.14 | NY0026859 | Jan 2026 | 12 |
| Bay Park Sewage Treatment Plant | East Rockaway | 48.73 | NY0026450 | Jan 2026 | 4 |
| Conesus Lake County Sewer District | Lakeville | 1.02 | NY0032328 | Jan 2026 | 9 |
| Chateaugay (v) WWTP | Chateaugay | 0.57 | NY0024830 | Jan 2026 | 3 |
| Suffern (v) STP | Suffern | 0.89 | NY0022748 | Feb 2026 | 46 |
| Duanesburg Sd#1 STP | Duanesburg | 0.07 | NY0261271 | Feb 2026 | 3 |
| Vernon (v) STP | Vernon | 0.55 | NY0020249 | Apr 2026 | 3 |
| Marathon (v) STP | Marathon | 0.11 | NY0028363 | Apr 2026 | 1 |
| Lewiston Water Poll Cont Center | Lewiston | — | NY0024481 | Apr 2026 | 17 |
| Medina (v) WWTP | Medina | 1.84 | NY0021873 | May 2026 | 48 |
| Canton WWTP | Canton | 0.94 | NY0236586 | Jun 2026 | 36 |
| Ticonderoga Sd#5 WPCP | Ticonderoga | 1.15 | NY0036706 | Jul 2026 | 13 |
| Alfred Wastewater Treatment Plant | Alfred | 0.41 | NY0022357 | Jul 2026 | 21 |
| Warwick Sewer District 1 STP | Warwick | 0.19 | NY0021890 | Jul 2026 | 58 |
| Croghan (v) STP | Croghan | 0.04 | NY0206768 | Aug 2026 | 34 |
| Meadowbrook-Limestone WWTP | Manlius | — | NY0027723 | Aug 2026 | 17 |
| Wcw & Sa Regional WWTP | Red Creek | 0.32 | NY0246930 | Sep 2026 | 2 |
| Cleveland (v) WWTP | Cleveland | 0.03 | NY0214370 | Sep 2026 | 19 |
| Chemung Co Elmira Swr Dist Baker Rd WWTP | Chemung | 0.00061 | NY0246948 | Sep 2026 | 9 |
| Chemung Co Sd#1 STP | Elmira | — | NY0036986 | Sep 2026 | 168 |
| Hornell City Water Pollution Control Plant | Hornell | 3.26 | NY0023647 | Oct 2026 | 17 |
| Little Valley (v) STP | Little Valley | 0.09 | NY0104795 | Oct 2026 | 0 |
| Gorham (t) STP & Onsites | Gorham | 0.04 | NY0160814 | Oct 2026 | 22 |
| Hamilton (v) WPCP | Hamilton | 0.49 | NY0020672 | Nov 2026 | 1 |
| Canisteo (v) STP | Canisteo | 0.28 | NY0023248 | Nov 2026 | 3 |
| Greenfields Sewer System-Part County Sd#8 | Hyde Park | 0.08 | NY0097896 | Nov 2026 | 6 |
| Interlaken (v) STP | Interlaken | 0.03 | NY0029289 | Nov 2026 | 36 |
| Liberty Loomis Sewer District STP | Liberty | 0.03 | NY0030261 | Nov 2026 | 6 |
| Valley Dale STP | Pleasant Valley | 0.02 | NY0077593 | Nov 2026 | 27 |
| Noxon Knolls STP | Poughkeepsie | 0.02 | NY0026085 | Nov 2026 | 1 |
| South Albany Sd | Bethlehem | 0.0018 | NY0191825 | Nov 2026 | 7 |
| Lake Placid (v) WPCP | Lake Placid | 0.96 | NY0022187 | Dec 2026 | 1 |
| Honeoye Falls (v) WWTP | Honeoye Falls | 0.39 | NY0025259 | Dec 2026 | 1 |
| Sharon Springs (v) STP | Sharon Springs | 0.09 | NY0033588 | Dec 2026 | 2 |
| Narrowsburg Sd STP | Narrowsburg | 0.04 | NY0110205 | Dec 2026 | 11 |
| Byron (t) WWTF | Byron | 0.03 | NY0160971 | Dec 2026 | 11 |
| New Baltimore (t) Sd STP | New Baltimore | 0.02 | NY0109151 | Dec 2026 | 3 |
| Elma (t) Sd#4-Briggswood Subdivision | Elma | 0.01 | NY0032051 | Dec 2026 | 3 |
| Dunkirk Wastewater Treatment Facility | Dunkirk | — | NY0027961 | Dec 2026 | 11 |
New York permit renewals in 2026: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · MGD · Lift station · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “NPDES permits expiring in 2026: New York wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/new-york/permits-expiring/2026Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.