What is the Municipal Separate Storm Sewer System (MS4)?
Polluted stormwater runoff from the City is transported through the Municipal Separate Storm Sewer Systems (MS4s), from which it is discharged untreated into local waterbodies. This system includes gutters, inlets, pipes, ditches and culverts throughout the City. To prevent harmful pollutants from being washed or dumped into an MS4, the City must obtain a NPDES permit and develop a stormwater management program (SWP).

Show All Answers

1. What is the National Pollutant Discharge Elimination System (NPDES)?
2. What is the Municipal Separate Storm Sewer System (MS4)?
3. Why does the City have a Phase II permit?
4. What does the Phase II permit require?
5. What kind of sampling is the City required to do?
6. What are the Six Minimum Control Measures?