Search and sort the table to see which New Hampshire towns have adopted stormwater model standards and how their regulations compare.
| Town | MS4 status | SWA Model Standards adopted | Year of reviewed stormwater regs | Impervious cover category | Stormwater regulations |
|---|---|---|---|---|---|
| Barrington | Waiver | No | 2024 | — | View regs |
| Brentwood | Waiver | No | 2010 | 10% cap | View regs |
| Brookfield | Not designated | No | 2026 | — | View regs |
| Candia | Waiver | No | 2019 | — | View regs |
| Chester | Waiver | No | 2025 | — | View regs |
| Danville | Full MS4 | No | 2025 | — | View regs |
| Deerfield | Not designated | No | — | — | View regs |
| Dover | Full MS4 | No | 2025 | — | View regs |
| Durham | Full MS4 | No | 2023 | — | View regs |
| East Kingston | Waiver | Yes | 2025 | — | View regs |
| Epping | Waiver | No | 2020 | — | View regs |
| Exeter | Full MS4 | Yes | 2026 | — | View regs |
| Farmington | Not designated | No | 1976 | — | View regs |
| Fremont | Waiver | Yes | 2021 | — | View regs |
| Greenland | Full MS4 | No | 2025 | — | View regs |
| Hampton | Full MS4 | No | 2026 | — | View regs |
| Hampton Falls | Waiver | No | 2025 | — | View regs |
| Kensington | Not designated | Yes | 2016 | — | View regs |
| Kingston | Full MS4 | No | — | — | View regs |
| Lee | Waiver | No | 2023 | 10% cap | View regs |
| Madbury | Waiver | No | 2017 | — | View regs |
| Middleton | Not designated | No | 2026 | — | View regs |
| Milton | Full MS4 | Yes | 2022 | — | View regs |
| New Castle | Full MS4 | Yes | 2021 | — | View regs |
| New Durham | Not designated | No | 2024 | — | View regs |
| Newfields | Waiver | No | 2014 | — | View regs |
| Newington | Waiver | No | — | — | View regs |
| Newmarket | Full MS4 | Partial | — | — | View regs |
| North Hampton | Full MS4 | No | 2017 | — | View regs |
| Northwood | Not designated | No | 2026 | — | View regs |
| Nottingham | Not designated | No | 2026 | 10% cap | View regs |
| Portsmouth | Full MS4 | No | 2006 | — | View regs |
| Raymond | Full MS4 | No | — | — | View regs |
| Rochester | Full MS4 | No | 2018 | — | View regs |
| Rollinsford | Full MS4 | No | 2018 | — | View regs |
| Rye | Full MS4 | Yes | 2022 | — | View regs |
| Sandown | Full MS4 | No | 2021 | — | View regs |
| Seabrook | Full MS4 | No | 2020 | — | View regs |
| Somersworth | Full MS4 | No | 2021 | — | View regs |
| Strafford | Not designated | Partial | 2026 | 10% cap | View regs |
| Stratham | Full MS4 | No | 2026 | — | View regs |
| Wakefield | Not designated | No | 2026 | — | View regs |