Checked October 20, 2026 against the permit text published by US EPA. Sources and sections are listed at the end of this page.
In New Hampshire, construction stormwater coverage comes from EPA 2022 Construction General Permit (as modified 2025) (permit no. NHR100000), issued by US EPA (EPA is the permitting authority). It took effect February 17, 2022 (modified permit effective April 8, 2025) and expires February 16, 2027 (proposed 2027 CGP published August 3, 2026).
At a glance
| Item | What the permit says |
|---|---|
| How coverage is obtained | NOI in EPA NeT-CGP (CDX) |
| Agency fee | None |
| Who may prepare the plan | No license or seal |
| Who inspects | Person meeting CGP Part 6.3 training (EPA CGP inspector course or equivalent) |
| Inspection frequency | Every 7 days, or every 14 days + within 24 h after 0.25 in (CGP Part 4.2.1-4.2.2) |
| State forms and templates | EPA SWPPP template (optional) |
Points that are easy to miss
- Disturbing more than 100,000 sq ft (50,000 in protected shoreland) also needs an NHDES Alteration of Terrain permit, whose drainage reports and plans are sealed by a NH professional engineer (Env-Wq 1502.60, 1504.01(e)); your engineer prepares that application.
- Existing permittees must re-file under the 2027 CGP once final.
What a SWPPP Desk plan covers here
We prepare a site-specific plan written to NHR100000, with each section mapped to the permit part it answers. You, the operator, review and sign it and keep it on site.
Checkout open, with limits in New Hampshire. State ruling: Sell (MA outside wetlands jurisdiction). The site check on the plan page applies these conditions before payment. See coverage.
Before checkout you confirm:
- The project disturbs no more than 100,000 sq ft (50,000 sq ft in protected shoreland), or, if it does, your New Hampshire professional engineer prepares the NHDES Alteration of Terrain permit application.
What we do not do
- Our plans are not sealed or stamped. BMPs that need design calculations, such as sediment basins and post-construction practices, come from your design professional.
- The operator signs the plan and is responsible for it.
- We do not visit or inspect sites.
- We do not file the NOI or any permit application for you. We tell you which form and portal the permit names.
Sources
- Permit text: www.epa.gov (Appendix B (coverage); Part 4.2; Part 6.3; Part 9 state conditions (9.1.1)). Checked 2026-10-20.
- Agency page: gc.nh.gov. Checked 2026-10-20.
SWPPP Desk is not affiliated with US EPA. If a rule here has changed, write to support@swpppdesk.com and we will correct this page.