| Municipality | Phone | Zip | Type of Sewer System |
| Village of Alsip http://villageofalsip.org | 708-385-6902 | 60803 | Separate Sewer Area |
| Village of Arlington Heights http://www.vah.com | 847-368-5000 | 60005 | Combined and Separate Sewer Area |
| Village of Bartlett http://www.village.bartlett.il.us/ | 630-837-0800 | 60103 | Separate Sewer Area |
| Village of Bedford Park http://villageofbedfordpark.com | 708-458-2067 | 60638 | Combined and Separate Sewer Area |
| Village of Bellwood http://www.vi.bellwood.il.us | 708-547-3500 | 60104 | Separate Sewer Area |
| Village of Bensenville http://www.bensenville.il.us/ | 630-766-8200 | 60106 | Separate Sewer Area, but does not discharge into MWRD Facilities |
| Village of Berkeley http://www.berkeley.il.us/ | 708-449-8840 | 60163 | Separate Sewer Area |
| City of Berwyn http://www.berwyn-il.gov/ | 708-788-2660 | 60402 | Combined Sewer Area |
| City of Blue Island http://www.blueisland.org | 708-597-8603 | 60406 | Combined Sewer Area |
| Village of Bridgeview http://www.villageofbridgeview.com | 708-594-2525 | 60455 | Separate Sewer Area |
| Village of Broadview http://www.villageofbroadview.com/ | 708-681-3600 | 60155 | Combined and Separate Sewer Area |
| Village of Brookfield http://www.brookfieldil.gov | 708-485-7344 | 60513 | Combined and Separate Sewer Area |
| Village of Buffalo Grove http://www.vbg.org | 847-459-2500 | 60089 | Separate Sewer Area |
| City of Burbank http://www.burbankil.gov | 708-599-5500 | 60459 | Separate Sewer Area, System owned by others |
| Village of Burnham http://www.villageofburnhamil.com | 708-862-9150 | 60633 | Combined Sewer Area |
| Village of Burr Ridge http://www.burr-ridge.gov/ | 630-654-8181 | 60527 | Separate Sewer Area |
| Calumet City http://www.calumetcity.org | 708-891-8105 | 60409 | Combined and Separate Sewer Area |
| Village of Calumet Park http://calumetparkvillage.org | 708-389-1906 | 60827 | Combined Sewer Area |
| City of Chicago http://cityofchicago.org/ | 311 | 60602 | Combined Sewer Area |
| City of Chicago Heights http://www.chicagoheights.net/ | 708-756-5300 | 60411 | Separate Sewer Area, but does not discharge into MWRD Facilities |
| Village of Chicago Ridge http://chicagoridge.org | 708-425-7700 | 60415 | Separate Sewer Area |
| Town of Cicero http://www.thetownofcicero.com | 708-656-3600 | 60804 | Combined Sewer Area |
| City of Country Club Hills http://www.countryclubhills.org | 708-798-2616 | 60478 | Separate Sewer Area |
| City of Countryside http://www.countryside-il.org/ | 708-354-7270 | 60525 | Separate Sewer Area, System owned by others |
| Village of Crestwood http://www.villageofcrestwood.com | 708-371-4800 | 60445 | Separate Sewer Area |
| Village of Deer Park http://www.villageofdeerpark.com/ | 847-726-1648 | 60010 | Separate Sewer Area, but does not discharge into MWRD Facilities |
| Village of Deerfield http://www.deerfield.il.us | 847-945-5000 | 60015 | Separate Sewer Area, but does not discharge into MWRD Facilities |
| City of Des Plaines http://www.desplaines.org | 847-391-5464 | 60016 | Combined and Separate Sewer Area |
| Village of Dixmoor http://www.villageofdixmoor.org/ | 708-389-6121 | 60426 | Combined Sewer Area |
| Village of Dolton http://vodolton.org | 708-201-3270 | 60419 | Combined and Separate Sewer Area |
| City of Elgin http://www.cityofelgin.org/ | 847-931-6100 | 60120 | Separate Sewer Area |
| Elk Grove Village http://www.elkgrove.org/ | 847-439-3900 | 60007 | Separate Sewer Area, but does not discharge into MWRD Facilities |
| City of Elmhurst http://www.elmhurst.org/ | 630-530-3000 | 60126 | Separate Sewer Area |
| Village of Elmwood Park http://www.elmwoodpark.org | 708-452-3911 | 60707 | Separate Sewer Area |
| City of Evanston http://cityofevanston.org | 847-866-2925 | 60201 | Combined Sewer Area |
| Village of Evergreen Park http://www.evergreenpark-ill.com | 708-422-1551 | 60806 | Combined Sewer Area |
| Village of Flossmoor http://flossmoor.org | 708-798-2300 | 60422 | Separate Sewer Area |
| Village of Ford Heights | 708-758-3131 | 60411 | Separate Sewer Area |
| Village of Forest Park http://www.forestpark.net | 708-366-2323 | 60130 | Separate Sewer Area |
| Village of Forest View | 708-788-3429 | 60402 | Combined Sewer Area |
| Village of Frankfort http://www.villageoffrankfort.com/ | 815-469-2177 | 60423 | Combined Sewer Area |
| Village of Franklin Park http://villageoffranklinpark.com | 847-671-4800 | 60131 | Separate Sewer Area |
| Village of Glencoe http://www.goglencoe.com/ | 847-835-4114 | 60022 | Combined and Separate Sewer Area |
| Village of Glenview http://www.glenview.il.us | 847-724-1700 | 60025 | Separate Sewer Area |
| Village of Glenwood http://www.villageofglenwood.com | 708-753-2400 | 60425 | Separate Sewer Area |
| Village of Golf http://villageofgolf.us/ | 847-998-8852 | 60029 | Separate Sewer Area |
| Village of Hanover Park http://www.hanoverparkillinois.org | 630-372-4200 | 60133 | Combined Sewer Area |
| City of Harvey http://www.cityofharvey.org | 708-210-5301 | 60426 | Separate Sewer Area |
| Village of Harwood Heights http://www.harwoodheights.org | 708-867-7200 | 60706 | Combined and Separate Sewer Area |
| Village of East Hazel Crest http://easthazelcrest.com/ | 708-798-0213 | 60429 | Combined and Separate Sewer Area |
| Village of Hazel Crest http://www.villageofhazelcrest.com/ | 708-335-9600 | 60429 | Separate Sewer Area |
| City of Hickory Hills http://hickoryhillsil.org/ | 708-598-4800 | 60457 | Separate Sewer Area |
| Village of Hillside http://www.hillside-il.org | 708-449-6450 | 60162 | Separate Sewer Area |
| Village of Hinsdale http://www.villageofhinsdale.org/ | 630-789-7000 | 60521 | Separate Sewer Area |
| Village of Hodgkins http://www.villageofhodgkins.org/ | 708-579-6700 | 60525 | Separate Sewer Area |
| Village of Hoffman Estates http://www.hoffmanestates.com/ | 847-882-9100 | 60169 | Separate Sewer Area |
| Village of Hometown http://www.cityofhometown.org/ | 708-424-7503 | 60456 | Combined Sewer Area |
| Village of Homewood http://www.village.homewood.il.us/ | 708-798-3000 | 60430 | Separate Sewer Area |
| Village of Indian Head Park http://www.indianheadpark-il.gov/ | 708-246-3080 | 60525 | Separate Sewer Area |
| Village of Inverness http://www.villageofinverness.org/ | 847-358-7740 | 60067 | Separate Sewer Area |
| Village of Justice http://villageofjustice.org | 708-458-2520 | 60458 | Separate Sewer Area |
| Village of Kenilworth http://www.villageofkenilworth.org | 847-251-1666 | 60043 | Combined and Separate Sewer Area |
| Village of La Grange http://www.villageoflagrange.com | 708-579-2300 | 60525 | Combined and Separate Sewer Area |
| Village of La Grange Park http://www.lagrangepark.org | 708-354-0225 | 60526 | Combined and Separate Sewer Area |
| Village of Lansing http://www.villageoflansing.com | 708-895-7200 | 60438 | Combined and Separate Sewer Area |
| Village of Lemont http://www.lemont.il.us | 630-257-1550 | 60439 | Combined and Separate Sewer Area |
| Village of Lincolnwood http://www.lincolnwoodil.org | 847-745-4716 | 60712 | Combined Sewer Area |
| Village of Lynwood http://www.lynwoodil.us/ | 708-758-6101 | 60411 | Separate Sewer Area |
| Village of Lyons http://villageoflyons-il.net | 708-780-5200 | 60534 | Combined Sewer Area |
| City of Markham http://cityofmarkham.net | 708-331-4905 | 60426 | Combined and Separate Sewer Area |
| Village of Matteson http://www.villageofmatteson.org | 708-283-4900 | 60443 | Separate Sewer Area |
| Village of Maywood http://www.maywood-il.org | 708-450-6300 | 60153 | Combined Sewer Area |
| Village of McCook http://www.villageofmccook.org/ | 708-447-9030 | 60525 | Separate Sewer Area |
| Village of Melrose Park http://www.melrosepark.org | 708-343-4000 | 60160 | Combined and Separate Sewer Area |
| Village of Merrionette Park http://www.merrionettepark.org/ | 708-396-3183 | 60655 | Separate Sewer Area |
| Village of Midlothian http://www.villageofmidlothian.net | 708-389-0200 | 60445 | Separate Sewer Area |
| Village of Morton Grove http://www.mortongroveil.org | 847-965-4100 | 60053 | Combined and Separate Sewer Area |
| Village of Mount Prospect http://www.mountprospect.org | 847-392-6000 | 60056 | Combined and Separate Sewer Area |
| Village of Niles http://www.vniles.com | 847-588-8000 | 60714 | Combined and Separate Sewer Area |
| Village of Norridge http://www.villageofnorridge.com | 708-453-0800 | 60706 | Combined and Separate Sewer Area |
| Village of North Riverside http://www.northriverside-il.org | 708-447-4211 | 60546 | Separate Sewer Area |
| Village of Northbrook http://www.northbrook.il.us | 847-272-5050 | 60062 | Separate Sewer Area |
| Village of Northfield http://www.northfieldil.org | 847-446-9200 | 60093 | Separate Sewer Area |
| City of Northlake http://www.northlakecity.com | 708-343-8700 | 60164 | Combined and Separate Sewer Area |
| Village of Oak Brook http://www.oak-brook.org/ | 630-368-5000 | 60523 | Separate Sewer Area |
| City of Oak Forest http://www.oak-forest.org | 708-687-4050 | 60452 | Separate Sewer Area |
| Village of Oak Lawn http://www.oaklawn-il.gov | 708-636-4400 | 60453 | Separate Sewer Area |
| Village of Oak Park http://www.oak-park.us/ | 708-383-6400 | 60302 | Combined Sewer Area |
| Village of Olympia Fields http://www.olympia-fields.com | 708-503-8000 | 60461 | Separate Sewer Area |
| Village of Orland Hills http://www.orlandhills.org | 708-349-6865 | 60477 | Separate Sewer Area, System owned by others |
| Village of Orland Park http://www.orland-park.il.us | 708-403-6140 | 60462 | Separate Sewer Area |
| Village of Palatine http://www.palatine.il.us/ | 847-358-7500 | 60067 | Separate Sewer Area |
| City of Palos Heights http://www.palosheights.org | 708-361-1800 | 60463 | Separate Sewer Area |
| City of Palos Hills http://paloshillsweb.org | 708-598-3400 | 60465 | Separate Sewer Area |
| Village of Palos Park http://www.palospark.org | 708-671-3700 | 60464 | Separate Sewer Area |
| City of Park Ridge http://www.parkridge.us | 847-318-5200 | 60068 | Combined and Separate Sewer Area |
| Village of Phoenix http://www.villageofphoenix.com | 708-331-1455 | 60426 | Combined Sewer Area |
| Village of Posen http://www.villageofposen.org/ste/ | 708-385-0139 | 60469 | Combined Sewer Area |
| City of Prospect Heights http://www.prospect-heights.il.us | 847-398-6070 | 60070 | Separate Sewer Area |
| Village of Richton Park http://www.richtonpark.org/ | 708-481-8950 | 60471 | Separate Sewer Area |
| Village of River Forest http://vrf.us/ | 708-366-8500 | 60305 | Combined and Separate Sewer Area |
| Village of River Grove http://www.villageofrivergrove.org | 708-453-8000 | 60171 | Combined Sewer Area |
| Village of Riverdale http://www.villageofriverdale.net/ | 708-841-2200 | 60827 | Combined and Separate Sewer Area |
| Village of Riverside http://riverside.il.us | 708-447-2700 | 60546 | Combined Sewer Area |
| Village of Robbins http://robbins-il.com | 708-385-8940 | 60472 | Separate Sewer Area |
| City of Rolling Meadows http://www.ci.rolling-meadows.il.us/ | 847-394-8500 | 60008 | Separate Sewer Area |
| Village of Roselle http://www.roselle.il.us/ | 630-980-2000 | 60172 | Separate Sewer Area |
| Village of Rosemont http://www.rosemont.com/ | 847-825-4404 | 60018 | Separate Sewer Area |
| Village of Sauk Village http://www.saukvillage.org/ | 708-758-3330 | 60411 | Separate Sewer Area |
| Village of Schaumburg http://www.ci.schaumburg.il.us/ | 847-895-4500 | 60193 | Separate Sewer Area |
| Village of Schiller Park http://villageofschillerpark.com | 847-678-2550 | 60176 | Combined and Separate Sewer Area |
| Village of Skokie http://www.skokie.org | 847-673-0500 | 60077 | Combined Sewer Area |
| Village of South Barrington http://www.southbarrington.org/ | 847-381-7510 | 60010 | Separate Sewer Area |
| Village of South Chicago Heights http://www.southchicagoheights.com/ | 708-755-1880 | 60411 | Separate Sewer Area, No Sewers under its jurisdiction |
| Village of South Holland http://www.southholland.org | 708-210-2900 | 60473 | Combined and Separate Sewer Area |
| Village of Steger http://www.villageofsteger.com/ | 708-754-3395 | 60475 | Separate Sewer Area |
| Village of Stickney http://villageofstickney.com | 708-749-4400 | 60402 | Combined Sewer Area |
| Village of Stone Park http://www.vosp.us/ | 708-345-5552 | 60165 | Separate Sewer Area |
| Village of Streamwood http://www.streamwood.org/ | 630-736-3800 | 60107 | Separate Sewer Area |
| Village of Summit http://www.thevillageofsummit.com/ | 708-563-4800 | 60501 | Combined Sewer Area |
| Village of Thornton http://thornton60476.com | 708 877-4456 | 60476 | Separate Sewer Area |
| Village of Tinley Park http://www.tinleypark.org/ | 708-444-5000 | 60477 | Separate Sewer Area |
| Village of Westchester http://www.westchester-il.org/ | 708-345-0020 | 60154 | Separate Sewer Area |
| Village of Western Springs http://www.wsprings.com | 708-246-1800 | 60558 | Combined and Separate Sewer Area |
| Village of Wheeling http://vi.wheeling.il.us | 847-459-2600 | 60090 | Separate Sewer Area |
| Village of Willow Springs http://www.willowsprings-il.gov | 708 467-3400 | 60480 | Separate Sewer Area |
| Village of Wilmette http://www.wilmette.com | 847-853-7511 | 60091 | Combined and Separate Sewer Area |
| Village of Winnetka http://www.villageofwinnetka.org/ | 847-501-6000 | 60093 | Separate Sewer Area |
| Village of Worth http://www.villageofworth.com/ | 708-448-1181 | 60482 | Separate Sewer Area |
| Township | Type of Sewer System |
| Barrington Twp | Separate Sewer Area, No Sewers under its jurisdiction |
| Berwyn Twp | Combined Sewer Area |
| Bloom Twp | Separate Sewer Area, System owned by others |
| Bremen Twp | Separate Sewer Area, System owned by others |
| Calumet Twp | Separate Sewer Area, System owned by others |
| Cicero Twp | Combined Sewer Area |
| Elk Grove Twp | Separate Sewer Area |
| Evanston Twp | Combined Sewer Area |
| Hanover Twp | Separate Sewer Area, System owned by others |
| Lemont Twp | Combined and Separate Sewer Area, System owned by others |
| Leyden Twp | Separate Sewer Area |
| Lyons Twp | Separate Sewer Area, System owned by others |
| Maine Twp | Separate Sewer Area |
| New Trier Twp | Separate Sewer Area, System owned by others |
| Niles Twp | Separate Sewer Area, System owned by others |
| Northfield Twp | Separate Sewer Area |
| Norwood Park Twp | Separate Sewer Area, System owned by others |
| Oak Park Twp | Combined Sewer Area |
| Orland Twp | Separate Sewer Area, System owned by others |
| Palatine Twp | Separate Sewer Area |
| Palos Twp | Separate Sewer Area, No Sewers under its jurisdiction |
| Proviso Twp | Separate Sewer Area, System owned by others |
| Rich Twp | Separate Sewer Area, System owned by others |
| River Forest Twp | Combined Sewer Area |
| Riverside Twp | Combined Sewer Area |
| Schaumburg Twp | Separate Sewer Area, System owned by others |
| Stickney Twp | Separate Sewer Area, System owned by others |
| Thornton Twp | Separate Sewer Area, System owned by others |
| Wheeling Twp | Separate Sewer Area, System owned by others |
| Worth Twp | Separate Sewer Area |