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Stormwater Management
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What is Stormwater

Stormwater is water from precipitation that flows across the ground and pavement when it rains or when snow and ice melt.  The water seeps into the ground or drains into what we call storm sewers.  These are the drains you see at street corners or at low points on the sides of streets.  Collectively, the draining water is called storm water runoff.

Stormwater becomes a problem when it picks up debris, chemicals, dirt and other pollutants and flow into a storm sewer system or directly to a lake, stream, river, wetland, or coastal water.  Anything that enters a storm sewer system is discharged untreated into the waterbodies we use for swimming, fishing and providing drinking water.

Federal stormwater Regulations and the Pennsylvania Stormwater Management Act require counties and municipalities to develop and implement a stormwater management program.  These regulations, along with the Federal Cleanwater Act, govern what local municipalities must do to reduce discharge of pollutants into local rivers, streams, lakes and water sheds.

Communities that discharge stormwater into any waterway that the DEP identifies as “impaired”, are required to develop a “Pollutant Reduction Plan” (PRP).  New Sewickley Township falls into that category.  Because every MS4 faces unique stormwater challenges, each management plan is unique.  This is a non-funded federally mandated program.  Each of the “Pollutant Reduction Plans” (PRP) must be designed by our Township Engineers, constructed by our township employees and outside experts for many years to come.  It is going to be expensive and get increasingly expensive in the years to come as the number of PRP sites increases.

Four specific areas of the Township have been identified by DEP as stormwater management areas.  They are designated as MS4-1 9th Ext. Street Area, MS4-2 Northern Portion of Rt. 989, MS4-2 Southern Portion of Rt. 989 and MS4-3 Sunflower Corners Area.   See the maps below

MS4-1 Area  (Harvey Run Road & 9th Street Area)

MS4-1 Harvey Run - 9th St. Area

MS4 – 2 Area  (Route 989 Northern Portion)

MS4-2 Rt. 989 Northern Portion

MS4 – 2 Area  (Route 989 Southern Portion)

MS4-2 Rt. 989 Southeren Portion

MS4 –  3 Area  (Sunflower Corners)

MS4-3 Sunflower Corners

On-Lot Septic Systems

Does your property have an on-lot septic system?   If you do, it is recommended that you have your system inspected and serviced by a professional technician at least once every two years.  Failing septic systems can send harmful plumes of nitrogen, phosphorous, and bacteria into nearby waterways, threatening plant and animal life and endangering local water supplies.

For more information visit:



Stormwater Management Ordinance

Ord 202

Ord 166

What can I do

Fee for Stormwater Management

Ord 222

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