SERVICE AREA MAP
| COOK COUNTY MUNICIPALITIES COMPLETELY WITHIN DISTRICT CORPORATE BOUNDARIES |
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| MUNICIPALITY | TYPE OF SYSTEM | MUNICIPALITY | TYPE OF SYSTEM |
| ALSIP | S | LYONS | C |
| ARLINGTON HEIGHTS | C & S | MARKHAM | C & S |
| BEDFORD PARK | C & S | MATTESON | S |
| BELLWOOD | S | MAYWOOD | C |
| BERKELEY | S | MCCOOK | S |
| BERWYN | C | MELROSE PARK | C & S |
| BLUE ISLAND | C | MERRIONETTE PARK | S |
| BRIDGEVIEW | S | MIDLOTHIAN | S |
| BROADVIEW | C & S | MORTON GROVE | C & S |
| BROOKFIELD | C & S | MOUNT PROSPECT | C & S |
| BURBANK | S | NILES | C & S |
| BURNHAM | C | NORRIDGE | C & S |
| CALUMET CITY | C & S | NORTH RIVERSIDE | C & S |
| CALUMET PARK | C | NORTHBROOK | S |
| CHICAGO | C | NORTHFIELD | S |
| CHICAGO RIDGE | S | NORTHLAKE | S |
| CICERO | C | OAK FOREST | S |
| COUNTRY CLUB HILLS | S | OAK LAWN | S |
| COUNTRYSIDE | S | OAK PARK | C |
| CRESTWOOD | S | OLYMPIA FIELDS | S |
| DES PLAINES | C & S | ORLAND HILLS | S |
| DIXMOOR | C | PALATINE | S |
| DOLTON | C & S | PALOS HEIGHTS | S |
| EAST HAZEL CREST | S | PALOS HILLS | S |
| ELMWOOD PARK | C | PALOS PARK | S |
| EVANSTON | C | PARK RIDGE | C & S |
| EVERGREEN PARK | S | PHOENIX | C |
| FLOSSMOOR | S | POSEN | C |
| FORD HEIGHTS | S | PROSPECT HEIGHTS | S |
| FOREST PARK | C | RICHTON PARK | S |
| FOREST VIEW | C | RIVER FOREST | C |
| FRANKLIN PARK | C & S | RIVER GROVE | C & S |
| GLENCOE | S | RIVERDALE | C & S |
| GLENVIEW | S | RIVERSIDE | C |
| GLENWOOD | S | ROBBINS | S |
| GOLF | C | ROLLING MEADOWS | S |
| HARVEY | C & S | ROSEMONT | S |
| HARWOOD HEIGHTS | C & S | SCHILLER PARK | C & S |
| HAZEL CREST | S | SKOKIE | C |
| HICKORY HILLS | S | SOUTH HOLLAND | C & S |
| HILLSIDE | S | STICKNEY | C |
| HODGKINS | S | STONE PARK | S |
| HOMETOWN | C | STREAMWOOD | S |
| INDIAN HEAD PARK | S | SUMMIT | C |
| JUSTICE | S | THORNTON | S |
| KENILWORTH | C & S | WESTCHESTER | S |
| LA GRANGE | C & S | WESTERN SPRINGS | C & S |
| LA GRANGE PARK | C & S | WILLOW SPRINGS | S |
| LANSING | C & S | WILMETTE | C & S |
| LINCOLNWOOD | C | WINNETKA | S |
| LYNWOOD | S | WORTH | S |
| 102 MUNICIPALITIES COMPLETELY WITHIN DISTRICT CORPORATE BOUNDARIES | |||
| LEGEND | |||
| C | COMBINED SEWER SYSTEM | D | DOES NOT DISCHARGE INTO DISTRICT FACILITIES |
| S | SEPARATE SEWER SYSTEM | * | MUNICIPALITY ALSO LOCATED IN ADJACENT COUNTY |
| COOK COUNTY MUNICIPALITIES PARTIALLY WITHIN DISTRICT CORPORATE BOUNDARIES |
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| MUNICIPALITY | TYPE OF SYSTEM | MUNICIPALITY | TYPE OF SYSTEM |
| BARRINGTON HILLS * | S, D | HOMEWOOD | S |
| BARTLETT * | S | INVERNESS | S |
| BENSENVILLE * | S, D | LEMONT * | C & S |
| BUFFALO GROVE * | S | OAK BROOK * | S, D |
| BURR RIDGE * | S | ORLAND PARK * | S |
| DEER PARK * | S | ROSELLE * | S |
| DEERFIELD * | S, D | SAUK VILLAGE * | S |
| CHICAGO HEIGHTS | S, D | SCHAUMBURG * | S |
| ELGIN * | S | SOUTH BARRINGTON | S |
| ELK GROVE VILLAGE * | S | STEGER * | S, D |
| ELMHURST * | S, D | TINLEY PARK * | S |
| HANOVER PARK * | S | UNIVERSITY PARK * | S, D |
| HINSDALE * | S | WHEELING * | S |
| HOFFMAN ESTATES * | S | ||
| 27 MUNICIPALITIES PARTIALLY WITHIN DISTRICT CORPORATE BOUNDARIES |
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| COOK COUNTY MUNICIPALITIES NOT WITHIN DISTRICT CORPORATE BOUNDARIES |
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| MUNICIPALITY | TYPE OF SYSTEM | MUNICIPALITY | TYPE OF SYSTEM |
| BARRINGTON * | S, D | PARK FOREST * | S, D |
| EAST DUNDEE * | S, D | SOUTH CHICAGO HEIGHTS | S, D |
| FRANKFORT * | S, D | ||
| 5 MUNICIPALITIES NOT WITHIN DISTRICT CORPORATE BOUNDARIES | |||
| COOK COUNTY TOWNSHIPS COMPLETELY WITHIN DISTRICT CORPORATE BOUNDARIES |
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| TOWNSHIP | TYPE OF SYSTEM | TOWNSHIP | TYPE OF SYSTEM |
| BERWYN | C | NORWOOD PARK | C & S |
| CALUMET | C & S | OAK PARK | C |
| CICERO | C | ORLAND | S |
| ELK GROVE | C & S | PALOS | S |
| EVANSTON | C | PROVISO | C & S |
| LEMONT | C & S | RIVER FOREST | C & S |
| LEYDEN | C & S | RIVERSIDE | C & S |
| LYONS | C & S | SCHAUMBURG | S |
| MAINE | C & S | STICKNEY | C & S |
| NEW TRIER | C & S | WHEELING | C & S |
| NILES | C & S | WORTH | C & S |
| NORTHFIELD | S | ||
| 23 TOWNSHIPS COMPLETELY WITHIN DISTRICT CORPORATE BOUNDARIES |
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| COOK COUNTY TOWNSHIPS PARTIALLY WITHIN DISTRICT CORPORATE BOUNDARIES |
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| TOWNSHIP | TYPE OF SYSTEM | TOWNSHIP | TYPE OF SYSTEM |
| BARRINGTON | S | PALATINE | S |
| BLOOM | S | RICH | S |
| BREMEN | C & S | THORNTON | C & S |
| HANOVER | S | ||
| 7 TOWNSHIPS PARTIALLY WITHIN DISTRICT CORPORATE BOUNDARIES |
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