Stormwater

As the population of Washington increases, urban development is also increasing. This means more people, more developed land, and increased rainwater runoff and contamination in Washington waters.

Based on federal and state laws, we allow you to manage surface water and groundwater drainage contamination. Rainwater's license to the most populous cities and counties, as well as industrial areas, construction sites, and many companies

As a last resort, you do not meet the pollution control permits. The penalty we charge is paid by the state government general fund or a special pollution prevention account.

The National Pollutant Release Control System (NPDES) of the National Water Purification Law establishes various approval requirements for various types of pollutant emissions.

NPDES and the National Wastewater Rainwater General License are designed to manage the release of pollutants into water. For details, please refer to Rainwater General License.

Please see our Rainwater License Guidance page for details on application, change, implementation and compliance with rainwater usage permission.

Rainwater compliance monitoring information is included in the license and reporting information system (PARIS)

Did you prevent or reduce rainwater spill contamination? Display rainwater behavior monitoring (SAM) plan and other results on rainwater monitoring page

Rainwater can be classified as contaminated or uncontaminated water source. Rainwater is classified as a point source if it is regulated by the rainwater plan of the National Pollutant Release Control System (NPDES). NPDES rainwater permission is required for interruption of specific industrial activities and more than five construction activities when combining the mid- and large-scale torrential rain water system (MS 4) regions and counties with population over 100,000. NPDES permission is also required for small MS 4 and small-scale construction activities in "urbanized areas" destroying 1-5 acres (ac) land. The NPDES accreditation body also requires small MS4 operators who are not urbanized areas and less than a small exchange building activity to acquire NPDES licenses based on the potential contribution to the breach of water quality standards There is a possibility of requesting.

The NPDES Rainwater Program manages some of the stormwater emissions from three potential sources. It is the municipal individual rainwater pipeline system (MS 4), construction activities, and industrial activities. Operators of these water sources may need to obtain NPDES permission before releasing rainwater. The authorization mechanism is designed to prevent rainwater runoff from washing dangerous pollutants into local surface water. Population growth and urban / urbanization development are the main reasons for the amount of pollutants in the runoff water, the obstructing surface runoff, and the main factors. Together they bring about changes in hydrology and water quality, resulting in habitat change and loss, increased flooding, decreased aquatic biodiversity, and increased deposition and erosion. Advantages of effective outflow management of rainwater are as follows.

Introduction Managing the outflow of rainwater and its influence is a serious problem faced by many communities in the western North Carolina province and nationwide. Citizens complain that flooding spills have led to floods and state and federal governments are forcing regional rainwater plans to manage rainwater contamination. Rainwater can be discharged into streets and artificial drainage systems, including rainwater drain pipes and underground pipes commonly referred to as "sewer pipes". These sewers should not be confused with hygiene sewers that transport humans and industrial wastewater to the treatment plant. I reached the river. Rainwater entering the rainwater pipeline usually does not receive any treatment before entering the creek, lake and other surface water. The rain here flows to the Broad River of France, then to the Tennessee River and then to the Mississippi River, which eventually flows to the Gulf of Mexico.