New York wastewater permits expiring in 2026
41 NPDES permits · 120 MGD combined average flow
41 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 | Technology | Violations (3y) |
|---|---|---|---|---|---|---|
| Cedar Creek WPCP | Wantagh | 62.2 | NY0026859 | Jan 2026 | Clarifiers, Biogas silos, Biogas balloons | 12 |
| Bay Park Sewage Treatment Plant | East Rockaway | 48.5 | NY0026450 | Jan 2026 | Clarifiers, Biogas balloons | 4 |
| Conesus Lake County Sewer District | Lakeville | 0.54 | NY0032328 | Jan 2026 | Clarifiers, Biogas silos, Biogas balloons | 9 |
| Chateaugay (v) WWTP | Chateaugay | 0.45 | NY0024830 | Jan 2026 | Aerated lagoons | 3 |
| Suffern (v) STP | Suffern | 0.8 | NY0022748 | Feb 2026 | Biogas silos, Biogas balloons | 43 |
| Duanesburg Sd#1 STP | Duanesburg | 0.05 | NY0261271 | Feb 2026 | — | 3 |
| Vernon (v) STP | Vernon | 0.33 | NY0020249 | Apr 2026 | — | 3 |
| Marathon (v) STP | Marathon | 0.07 | NY0028363 | Apr 2026 | — | 0 |
| Lewiston Water Poll Cont Center | Lewiston | — | NY0024481 | Apr 2026 | Clarifiers, Aerated lagoons, Biogas silos | 17 |
| Medina (v) WWTP | Medina | 0.8 | NY0021873 | May 2026 | Clarifiers, Biogas silos | 46 |
| Canton WWTP | Canton | 0.38 | NY0236586 | Jun 2026 | Aerated lagoons | 37 |
| Ticonderoga Sd#5 WPCP | Ticonderoga | 0.74 | NY0036706 | Jul 2026 | Clarifiers | 14 |
| Alfred Wastewater Treatment Plant | Alfred | 0.3 | NY0022357 | Jul 2026 | Clarifiers, Biogas silos | 21 |
| Schroon Lake WWTP | Schroon Lake | 0.2 | NY0020231 | Jul 2026 | Biogas balloons | 1 |
| Warwick Sewer District 1 STP | Warwick | 0.14 | NY0021890 | Jul 2026 | Carrousels / oxidation ditches | 59 |
| Lyon Mountain Sd WWTP | Lyon Mountain | 0.01 | NY0239577 | Jul 2026 | Biogas silos | 4 |
| Croghan (v) STP | Croghan | 0.07 | NY0206768 | Aug 2026 | — | 34 |
| Meadowbrook-Limestone WWTP | Manlius | — | NY0027723 | Aug 2026 | Clarifiers | 17 |
| Wcw & Sa Regional WWTP | Red Creek | 0.22 | NY0246930 | Sep 2026 | Carrousels / oxidation ditches | 2 |
| Cleveland (v) WWTP | Cleveland | 0.02 | NY0214370 | Sep 2026 | — | 17 |
| Chemung Co Elmira Swr Dist Baker Rd WWTP | Chemung | 0.00095 | NY0246948 | Sep 2026 | — | 9 |
| Chemung Co Sd#1 STP | Elmira | — | NY0036986 | Sep 2026 | Clarifiers, Biogas silos | 169 |
| Hornell City Water Pollution Control Plant | Hornell | 2.5 | NY0023647 | Oct 2026 | — | 17 |
| Little Valley (v) STP | Little Valley | 0.06 | NY0104795 | Oct 2026 | — | 0 |
| Gorham (t) STP & Onsites | Gorham | 0.03 | NY0160814 | Oct 2026 | Biogas balloons | 23 |
| Hamilton (v) WPCP | Hamilton | 0.42 | NY0020672 | Nov 2026 | Biogas balloons | 1 |
| Canisteo (v) STP | Canisteo | 0.1 | NY0023248 | Nov 2026 | — | 3 |
| Greenfields Sewer System-Part County Sd#8 | Hyde Park | 0.05 | NY0097896 | Nov 2026 | Aerated lagoons, Uncovered lagoons | 9 |
| Liberty Loomis Sewer District STP | Liberty | 0.01 | NY0030261 | Nov 2026 | — | 6 |
| Noxon Knolls STP | Poughkeepsie | 0.01 | NY0026085 | Nov 2026 | — | 1 |
| Interlaken (v) STP | Interlaken | 0.006 | NY0029289 | Nov 2026 | — | 34 |
| South Albany Sd | Bethlehem | 0.00049 | NY0191825 | Nov 2026 | — | 7 |
| Valley Dale STP | Pleasant Valley | 0.000000021 | NY0077593 | Nov 2026 | — | 30 |
| Lake Placid (v) WPCP | Lake Placid | 0.8 | NY0022187 | Dec 2026 | Clarifiers, Biogas silos | 1 |
| Honeoye Falls (v) WWTP | Honeoye Falls | 0.27 | NY0025259 | Dec 2026 | Clarifiers, Biogas silos, Biogas balloons | 1 |
| Sharon Springs (v) STP | Sharon Springs | 0.07 | NY0033588 | Dec 2026 | — | 2 |
| Narrowsburg Sd STP | Narrowsburg | 0.03 | NY0110205 | Dec 2026 | — | 11 |
| Byron (t) WWTF | Byron | 0.02 | NY0160971 | Dec 2026 | — | 11 |
| New Baltimore (t) Sd STP | New Baltimore | 0.009 | NY0109151 | Dec 2026 | — | 3 |
| Elma (t) Sd#4-Briggswood Subdivision | Elma | 0.0061 | NY0032051 | Dec 2026 | — | 3 |
| Dunkirk Wastewater Treatment Facility | Dunkirk | — | NY0027961 | Dec 2026 | Clarifiers, Biogas silos | 12 |
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 September 11, 2026.