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Stormwater Management
Water Quality
Illicit Discharges Identification and Elimination
As part of meeting requirements for our NPDES Phase II Application, the City must design and implement a program to identify and eliminate illicit discharges. Illicit discharges are materials dumped into streams or the stormwater system that have been determined to be harmful to stream water quality or ecology.
The City has an ordinance that defines and prohibits illicit discharges to stormwater systems, including right of entry provisions, penalties, and due process procedures. Allowed discharges include:
- landscape irrigation/irrigation water/lawn watering
- water line flushing
- diversion of stream flows
- rising groundwater/groundwater infiltration
- uncontaminated pumped groundwater
- discharges from potable water sources
- foundation drains/crawl space pumps/footing drains
- air conditioning condensation
- springs
- individual residential car washing
- flows from riparian habitats and wetlands
- dechlorinated swimming-pool water
- street wash water
Erosion and Sediment Control
Soil erosion and sedimentation of streams is a serious threat to water quality. A very small amount of sediment moves through healthy streams at all times, but too much sediment can carry contaminants into waterways, reduce dissolved oxygen, smother organisms and their habitats, impair the function of stormwater facilities such as drains and ponds, and build up stream beds making flooding more likely.
More information on our erosion and sedimentation control program can be found on our Regulations and Ordinances page.
To report problems with soil erosion or sediment accumulation in streams, please contact Michele Gremminger at 636-379-5592 or email at micheleg@ofallon.mo.us or stormwater@ofallon.mo.us or send in a Stormwater Concern form.