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EPA MS4 Program Information

The National Pollutant Discharge Elimination System (NPDES) Phase II stormwater program requires that Municipal Separate Storm Sewer System (MS4s) address the six required elements contained in the federal regulations to reduce water pollution:

General Information


Information for Homeowners and Residents


Information for Businesses

Information for Builders and Developers

Don't Blow Your Grass Into The Streets.p

Additional Educational Material For Protecting Streams


20 Ways to Protect Your Stream & Streamside Property
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When it Rains
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Keep Car Washing from Harming Our Streams
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Fertilizer Informational Flyer
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Pennsylvania Sea Grant

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PA DEP Stormwater Management

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The United States Environmental Protection Agency Links
EPA Home

EPA A-Z Index


EPA NPDES Stormwater Programs


EPA Municipal Stormwater Resources


EPA Stormwater BMP Menu

Ridley Township Citizen Water Quality Hotlines

Sanitary Sewer Backups and Overflows or Illegal Dumping
Ridley Township

(Monday thru Friday 8:30 am to 4:30 pm)

After Hours Dial 9-1-1

Spills, Leaks, Creek Contamination
DEP Water Quality Hotline

Fisk Kills, Illegal Fishing
PA Fish Commission

Water Main Breaks
Aqua, PA

Construction Site Erosion and Sediment Discharge
Delaware County Conservation District

  Stormwater Management Ordinance

Click here for more information

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