Environmental Rules in Nashua, NH (2026)
5 verified environmental rules for Nashua, New Hampshire, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Nashua requires stormwater management and erosion control plans for subdivision and site plan applications, with numeric peak-discharge and water-quality treatment standards.
Nashua Stormwater Management Rules
Some RestrictionsNashua Land Use Code § 190-215(A)(1), (B)(1)
No new stormwater conveyances may discharge untreated stormwater directly to or cause erosion into wetlands or water bodies. (2) Rooftop runoff is considered uncontaminated for the purposes of these standards and therefore does not require treatment. B. Postdevelopment peak discharge rates. (1) Stormwater management systems must be designed so that the ten-year, twenty-four-hour postde...
Erosion Control
Nashua requires an administrative permit before loam, clay, sod, sand or gravel can be excavated and hauled off a site, and subdivision or site plans must separately meet the city's stormwater management standards.
Nashua Grading and Soil Removal Permit
Some RestrictionsNashua Revised Ordinances § 190-176(A)
Loam, clay, sod, sand and gravel may not be taken from land except after application and issuance of a permit from the Administrative Officer after consultation with the City Engineer. The application shall be processed as an administrative permit pursuant to Article XIV. B. Any area being excavated for buildings, farm ponds, man-made lakes, land contouring, swimming pools, streets and drive...
Flood Zones
Nashua requires a permit for any development in a FEMA-mapped special flood hazard area, and new construction or substantial improvement of a residential structure must have its lowest floor at least one foot above the 100-year flood elevation.
Nashua Floodplain Development Rules
Some RestrictionsNashua Revised Ordinances § 190-63
The Department of Building Safety shall review all building permit applications for new construction or substantial improvements to determine whether proposed building sites will be reasonably safe from flooding. If a proposed building site is located in a special flood hazard area, all development shall: A. Be designed (or modified) and adequately anchored to prevent floatation, collapse, o...
Vehicle Idling Restrictions
Nashua prohibits trucks over 18,000 pounds from idling more than 15 minutes between midnight and 6 a.m. in residential districts, whether parked, stopped, attended or unattended.
Nashua Limits Overnight Idling of Heavy Trucks
Some RestrictionsNashua Revised Ordinances § 320-79
No vehicle over 18,000 pounds' gross vehicle weight shall remain parked or stopped, whether attended or unattended, on public or private property within any residential district of the City, with its engine or any other auxiliary engine, power source or similar mechanical device operating, for a period in excess of 15 minutes between the hours of 12:00 midnight and 6:00 a.m. daily.
Flood Elevation Requirements
New and substantially improved homes in Nashua flood zones must sit at least one foot above the 100-year flood elevation, a one-foot freeboard above FEMA's base flood level.
Nashua Flood Elevation Freeboard Rule
Some RestrictionsNashua Revised Ordinances § 190-68B(1)
All new construction or substantial improvement of residential structures have the lowest floor (including basement) elevated at least one foot above the 100-year flood elevation. (2) That all new construction or substantial improvements of nonresidential structures have the lowest floor (including basement) elevated at least one or two feet above the one-hundred-year flood level depending o...