Environmental Rules in Connecticut (2026)

Connecticut DEEP issues a statewide MS4 general permit requiring municipalities to control stormwater discharges…

New Haven, Connecticut bans dumping anything but stormwater into its municipal separate storm sewer system under Code…

Waterbury's Department of Public Works regulates every discharge into the city's municipal separate storm sewer system…

Bethel requires a stormwater management plan for most new development, including any residential project adding more…

Bridgeport requires compliance with its Storm Water Management Manual for any project disturbing 20,000 square feet of…

Danbury bans discharging anything but stormwater into its storm drain system and requires best-management practices to…

No Hartford zoning permit, including for a parking lot, can allow untreated runoff to discharge directly into…

Norwalk bans discharging anything but stormwater into its municipal storm drain system, wetlands or watercourses, and…

Ridgefield's stormwater ordinance, Chapter 308 of the Town Code, bans discharging anything but stormwater into the…

Stamford bans dumping anything but rainwater into its storm drains under Chapter 201, the city's MS4 ordinance…

Conn. Gen. Stat. Sec. 22a-329 requires every municipality to adopt soil erosion and sediment control regulations…

Bethel's zoning regulations require every development to control erosion and sedimentation during and after…

Bridgeport requires any project that disturbs 20,000 square feet of earth, or just 5,000 square feet in a flood-prone…

Any grading, stripping, excavating, or earth change in Danbury needs an erosion and sedimentation control permit from…

Hartford requires an approved soil erosion and sediment control plan before any grading or land-disturbing activity…

New Haven requires a stormwater management plan for zoning applications involving a half-acre or more of land…

Norwalk requires a certified soil erosion and sediment control plan before any development that disturbs more than…

Ridgefield requires any earth-disturbing construction activity to follow the Connecticut DEP's 2002 Guidelines for Soil…

Stamford's Zoning Regulations require a Zoning Permit and Certificate of Zoning Compliance before regrading over 200…

The Connecticut Coastal Management Act (Sec. 22a-90 et seq.) requires consistency review of all development within the…

Bridgeport requires a city engineer-approved site plan or development permit before any building work in a FEMA-mapped…

Hartford bans new parking, structures, and driveways inside any mapped floodplain, and within 30 to 50 feet of the…

Norwalk's Flood Hazard Zone regulation, Code § 118-1100, controls construction across every FEMA-mapped special flood…

Every new structure or substantial improvement in a Ridgefield Special Flood Hazard Area must be flood-resistant and…

New building or substantial improvement in a Stamford special flood hazard area needs a Flood Hazard Area Permit and…

Bethel's Floodplain Overlay Zone, set under § 118-5.1, requires a zoning permit before any construction or development…

Any construction or development in Danbury's mapped floodplain zones, including manufactured homes, needs a floodplain…

New Haven requires a Floodplain Development Permit before any grading, filling, construction or substantial improvement…

Waterbury's flood control chapter applies to every area FEMA maps as a special flood hazard, currently Zones A and AE…

Building a residential dock in Stamford requires Coastal Site Plan Review by the Zoning Board because the zoning…

Bethel caps mobile source engine idling at 10 minutes when the vehicle isn't moving, under § 105-3, with exceptions for…

Bridgeport caps motor vehicle idling at ten minutes while parked, enforced by police and air pollution control officers…

Norwalk bars any stationary vehicle engine from idling more than three consecutive minutes, with narrow exceptions for…

Stamford caps unattended vehicle idling at three consecutive minutes citywide under its noise code, with narrow…

Waterbury caps heavy-truck idling at ten minutes near homes. City Code § 97.05(9), part of the Noise Ordinance, bars…

In Norwalk's AE flood zones, new residential construction and substantial improvements must have the lowest floor…

New or substantially improved homes in a Bethel flood hazard area must have their lowest floor, including any basement…

Bridgeport requires new and substantially improved residential buildings in mapped flood hazard areas to elevate the…

Nonresidential buildings in Danbury's flood zones must have their lowest floor raised to the 100-year flood elevation…

New construction and substantial improvements in a New Haven flood hazard area must sit at least two feet above base…

Ridgefield requires new and substantially improved residential structures in a mapped flood hazard area to have the…

New construction and substantially renovated buildings in Stamford's special flood hazard areas must have their lowest…

New construction and substantial improvements in a Waterbury special flood hazard area must have the lowest floor…