Projects > Stormwater Phase II Program for Berwick, South Berwick, Eliot, and Kittery
is Stormwater Phase II?
Today’s regulations (Phase II) expand the existing National Pollutant Discharge Elimination System (NPDES) storm water program (Phase I) to address storm water discharges from small municipal separate storm sewer systems (MS4s) (those serving less than 100,000 persons) and construction sites that disturb one to five acres. Although these sources are automatically designated by today’s rule, the rule allows for the exclusion of certain sources from the national program based on a demonstration of the lack of impact on water quality, as well as the inclusion of others based on a higher likelihood of localized adverse impact on water quality.
Today’s regulations also exclude from the NPDES program storm water discharges from industrial facilities that have ‘‘no exposure’’ of industrial activities or materials to storm water.
Finally, today’s rule extends from August 7, 2001 until March 10, 2003 the deadline by which certain industrial facilities owned by small MS4s must obtain coverage under an NPDES permit. This rule establishes a cost-effective, flexible approach for reducing environmental harm by storm water discharges from many point sources of storm water that are currently unregulated.
EPA believes that the implementation of the six minimum measures identified for small MS4s should significantly reduce pollutants in urban storm water compared to existing levels in a cost-effective manner. Similarly, EPA believes that implementation of Best Management Practices (BMP) controls at small construction sites will also result in a significant reduction in pollutant discharges and an improvement in surface water quality.
EPA believes this rule will result in monetized financial, recreational and health benefits, as well as benefits that EPA has been unable to monetize. Expected benefits include reduced scouring and erosion of streambeds, improved aesthetic quality of waters, reduced eutrophication of aquatic systems, benefit to wildlife and endangered and threatened species, tourism benefits, biodiversity benefits and reduced costs for siting reservoirs. In addition, the costs of industrial stormwater controls will decrease due to the exclusion of storm water discharges from facilities where there is ‘‘no exposure’’ of storm water to industrial activities and materials.
is required under a Phase II permit?
education and outreach on stormwater impacts
is Stormwater a Problem?
Nutrients such as phosphorus and nitrogen can be harmful to aquatic life by promoting the overgrowth of algae and depleting oxygen in the waterway. Toxic chemicals from automobiles, sediment from construction activities and careless application of pesticides, herbicides and fertilizers threaten the health of the receiving waterway and can kill fish and other aquatic life. Bacteria from animal wastes and illicit connections to sewer systems can make nearby lakes and bays unsafe for wading, swimming and the propagation of edible shellfish. According to an inventory conducted by the United States Environmental Protection Agency (EPA), half of the impaired waterways in the United States are affected by stormwater runoff from urban/suburban and construction sources.
Stormwater runoff cannot be treated using the same end-of-pipe controls appropriate for sewage and wastewater treatment plants. Pollutants in Stormwater runoff enter our waterways in numerous ways and the best point of control is usually at the pollutant's source. Significant water quality improvement can be made by employing best management practices, or "BMPs". Proper storage of chemicals, good housekeeping and just plain paying attention to what's happening during runoff events can lay the ground work for developing a relatively inexpensive stormwater pollution prevention program.
The EPA is
increasing their attention to stormwater pollution prevention in several
ways. A federal regulation, commonly known as Stormwater Phase II, requires
permits for stormwater discharges from Municipal Separate Storm Sewer
Systems (MS4s) in urbanized areas and for construction activities disturbing
one or more acres.
Phase II Annual Report for Permit Year 4 (June 3, 2006 - June 2, 2007)
Watershed Survey Report
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