Under the 1987 Clean Water Act Amendments, the USEPA developed new regulations to address storm water that might impact water quality. These new "Municipal Separate Storm Sewer System” (MS4) regulations were set up in two phases dependent upon population and are enforced by the USEPA.
The General Storm Water Permit for MS4s was reissued on February 10, 2016, and became effective on March 1, 2016. These reissued permits outline the following requirements on MS4 permit holders:Develop Storm Water Management Program
Develop a storm water management program comprised of best management practice BMPs and measureable goals for each of the following six minimum control measures:
Submit Notice of Intent
- Public education and outreach on storm water impacts
- Public involvement and participation
- Illicit discharge detection and elimination
- Construction site storm water runoff control
- Post construction storm water management in new development & redevelopment
- Pollution prevention/good housekeeping for municipal operations
Submit a completed Notice of Intent. Operators can choose to share responsibilities for meeting the Phase II program requirements. Those entities choosing to do so may submit jointly with other municipalities or governmental entities.Submit Annual Reports
The permittee must submit annual reports to the Agency by June 1st for each year that the permit is in effect. The report must include:
- The status of compliance with the permit conditions, including an assessment of the BMPs and progress toward the measurable goals
- Results of any information collected and analyzed, including monitoring data
- A summary of the storm water activities planned for the next reporting cycle
- A change in any identified best management practices or measurable goals
- If applicable, notice of relying on another governmental entity to satisfy some of the permit obligations
The regulations generally switch the focus for compliance inspection and enforcement to the governing Village. The regulations also focus on public and contractor education. The issue of education falls to the Village to perform and document. In 2015, the Village passed a comprehensive illicit discharge ordinance. This ordinance formalizes our clean water practices and is key to the governance of the new MS4 permit. National Pollutant Discharge Elimination System
The National Pollutant Discharge Elimination System (NPDES) has its origin in the Federal Clean Water Act. The program requires permits for the discharge of treated municipal effluent, treated industrial effluent and storm water. The permits establish the conditions under which the discharge may occur and establish monitoring and reporting requirements.
The Village maintains NPDES Permit Number ILM580006. This permit is for the combined sewer overflow connected to the Village’s Combined Sewer System. The overflow is located at the head water of Weller Creek, near Central Road within Mount Prospect.
The Public Works Department submits an annual report detailing the previous year’s operations and maintenance to our Combined Sewer System. In the event of an overflow into Weller Creek, the Metropolitan Water Reclamation District of Greater Chicago (MWRDGC) will respond and notify the proper governing agencies.