Annual Reports for MS4 General Stormwater
Learn more about stormwater management here: Water Quality (dupagecounty.gov)
Supporting Documents
Stormwater Permit 2018 (588 KB) Stormwater Permit 2019 (267 KB) Stormwater Permit 2020 (118 KB) Stormwater Permit 2021 (122 KB) NPDES Report 2018-19 (47 MB) NPDES Report 2019-20 (1 MB) NPDES Report 2020-21 (1 MB) NPDES Report 2021-22 (17 MB) NPDES Report 2022-23 (6 MB) NPDES Report 2023-24 (7 MB) 
