Bank Stabilization Project
What Is Stormwater, And
Why Is It An Issue?
When precipitation falls onto
land, some percolates into the soil while others may run off into
If the land has been treated
with pesticides or fertilizers, some of these chemicals may be carried
with the storm water.
If the land has been paved,
the runoff will carry away pollutants accumulated on the pavement.
Upstream pollutants, water,
and sediments can funnel down into rivers and lakes.
A useful indicator of the
severity of runoff problems in urban or suburban watersheds is the
acreage of impervious surface. This is important since these
paved areas may create 2 - 16 times the amount of runoff as a natural
How Does Stormwater
Runoff Degrade Surface Waters?
It carries with it a variety
It may cause flooding and
erosion as small streams cannot handle increased volumes of water.
It may result in increased
water temperatures in warmer months.
What Are Some Of The
Nutrients like phosphorus and
nitrogen - source can be fertilizers or animal waste. The impact
may include stimulating excessive growth of algae.
BOD (Biochemical Oxygen Demand
or Organic Wastes) - source is human and animal wastes. The
impact is loss of oxygen in streams which can kill fish.
Bacteria - source is animal or
human wastes. Impacts include risk of infection from pathogens
or bleach closures.
Suspended Sediments - source
is from erosion of soils. Impacts include reduced water clarity
and loss of aquatic habitat.
Role in Stormwater Management
Township Stormwater Management Ordinance
Stormwater Discharge Application
Stormwater Instructions for New Homeowners
Sediment Control for New Construction
Greater Johnstown Watershed
PaDEP Stormwater Management Site
Stormwater Management Resource Center
Watershed Atlas of the
Allegheny & Monongahela Rivers
The Township Office