The Federal Water Pollution Control Act of 1948 was the first major U.S. law to
address water pollution. It was amended in 1972 and the law became commonly known
as the Clean Water Act (CWA). This law:
 Established the basic structure for regulating pollutants discharges into the
waters of the United States.
 Gave EPA the authority to implement pollution control programs such as
setting wastewater standards for industry.
 Maintained existing requirements to set water quality standards for all
contaminants in surface waters.
 Made it unlawful for any person to discharge any pollutant from a point
source into navigable waters, unless a permit was obtained under its provisions.
 Funded the construction of sewage treatment plants under the construction
grants program.
 Recognized the need for planning to address the critical problems posed by
nonpoint source pollution.
Storm water is rainwater and melted snow that runs off streets, lawns, and other sites.
When storm water is absorbed into the ground, it is filtered and ultimately replenishes
aquifers or flows into streams and rivers.
In developed areas, however, impervious surfaces such as pavement and roofs
prevent precipitation from naturally soaking into the ground. Instead, the water runs
rapidly into storm drains, sewer systems, and drainage ditches and can cause:
 Downstream flooding, habitat destruction and stream bank erosion
 Increased turbidity
 Changes in the stream flow rate
 Combined sewer overflows or infrastructure damage
 Contaminated streams, rivers, and coastal water
The three main contaminants are nitrogen, phosphorous and sediment
So Why Manage Stormwater?
Traditional stormwater management design has been focused on collecting stormwater
in piped networks and transporting it off site as quickly as possible, either directly to a
stream or river, to a large stormwater management facility (basin), or to a combined
sewer system flowing to a wastewater treatment plant.
Low impact development (LID) and wet weather green infrastructure address these
concerns through a variety of techniques, including strategic site design, measures to
control the sources of runoff, and thoughtful landscape planning. LID aims to restore
natural watershed functions through small-scale treatment at the source of runoff. The
goal is to mimic natural conditions to manage the water.
Wet weather green infrastructure encompasses approaches and technologies to
infiltrate, evapo-transpire, capture, and reuse stormwater to maintain or restore natural
hydrologies.
So What Can You Do?
 Slow the flow. By slowing the flow of stormwater you allow more time for
pollutants to be naturally absorbed and removed from the water.
 Reduce the pollutants. Do basic things like pick up after your dog, wash your
car at a car wash, don’t fertilize in the fall.