Learn the Issues
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Urban Area Maps for NPDES MS4 Phase II Stormwater Permits
The universe of regulated small municipal separate storm sewer systems (MS4s) in urbanized areas expands every 10 years, according to the 1999 stormwater phase II final rule.
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NPDES State Program Authority
State authorization information, state authority information, and information on withdrawal petitions.
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Stormwater Discharges from Transportation Sources-Innovative Materials
Transportation authorities manage the runoff on street, road, and highways that has polluted by cars, trucks, buses, and other vehicles.
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Comprehensive Conservation and Management Plan for Sarasota Bay
Information on the restoration and protection of Sarasota Bay.
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State of the Bay Report for Maryland Coastal Bays Program
Information on the current condition of the Maryland Coastal Bays.
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State of the Bay Report for Tillamook Estuaries Partnership
Information on the current condition of the Tillamook Estuaries.
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Comprehensive Conservation and Management Plan for Indian River Lagoon
Information on the restoration and protection of the Indian River Lagoon Estuary.
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State of the Bay Report for Casco Bay
Information on the current condition of Casco Bay.
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Comprehensive Conservation and Management Plan for Coastal Bend Bays and Estuaries
Information on the restoration and protection of the bays and estuaries of South Texas.
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State of the Bay Report for Long Island Sound
Information on the current condition of the Long Island Sound bay and estuaries.
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State of the Bay Report for Sarasota Bay Estuary Program
Information on the current condition of the Sarasota Bay Estuary.
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State of the Bay Report for Delaware Inland Bays
Information on the current condition of the Delaware Inland Bays.
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South Florida Program Funding (SFP): Overview
The SFP’s statutory authority and what types of projects can be funded. It includes a list of the program’s priority focus areas, examples of eligible projects, a description of eligible applicants and information about the application submission process.
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LFGcost-Web Version History
Provides a history of the versions of LMOP's LFGcost-Web model from 2006 through the most recent version.
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Vehicle Emissions Inspection and Maintenance (I/M)
This section provides information on regulations and standards for state and local transportation.
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Manufacturer-Run In-Use Testing Program Data for Heavy-Duty Diesel Engines – Test Order Year 2011
This page provides manufacturer-run in-use testing program data from heavy-duty diesel engine manufacturers in compliance with 40 CFR 86 Subpart T for Test Year 2011.
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How SmartWay Advances Sustainable Transportation Supply Chains
This page provides information on how the SmartWay program has achieved reductions in freight transportation-related greenhouse gas emissions and how it will continue to do so with its Vision 2020 strategies.
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Boosting your Freight Decarbonization Journey in SmartWay
EPA’s SmartWay program webinar that learn how they’ve used these outputs to drive innovation, improve efficiency and support sustainability goals for their companies.
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What If Electric School Buses Could be Used to Supply Power When Off Duty?
Short paper describing the benefits of electric school buses – cleaner air, fewer emissions, and the potential to be roaming power sources.
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Documents from 2021 Diesel Emission Reduction Funding Opportunities Workshop
Presentations from EPA Workshop on Diesel Emission Reduction Funding Opportunities held Oct. 12-14, 2021