
The NPDES stormwater permit regulations cover the following classes of stormwater discharges:
- Operators of Municipal Separate Storm Sewer Systems (MS4s) located in local Urban Growth Areas and "urbanized areas" as delineated by the Bureau of the Census.
- Industrial facilities in any of the 11 categories that discharge to an MS4 or to waters of the United States; all categories of industrial activity (except construction) may certify to a condition of "no exposure" if their industrial materials and operations are not exposed to stormwater, thus eliminating the need to obtain stormwater permit coverage.
- Operators of construction activity that disturbs 1 or more acres of land; construction sites less than 1 acre are covered if part of a larger plan of development.
- Sand and gravel operators.

Show All Answers

4. How are the regional stormwater utility service areas determined?
5. What is stormwater and why is it a problem?
6. What is an impervious surface?
9. Are sewers and storm drains the same thing?
10. What can residents do to help improve stormwater quality?
11. What can you put down the storm drain?
15. What is the stormwater fee used for?
16. How is the stormwater fee calculated?
17. Is the utility fee just another tax?
18. Why a stormwater utility now?