Browse Water Systems
25,913 public water systems in IL.
Public Water Systems Database
Browse 25,913 EPA-regulated public water systems with identifiers, population served, and water source type. Use the filters below to narrow results by state, system type, or name.
| System Name | PWSID | State | Type | Population Served |
|---|---|---|---|---|
| ROY'S BLOOMINGDALE TAVERN | IL0041483 | Illinois | Transient Non-Community | 6,010,890 |
| CHICAGO | IL0316000 | Illinois | Community | 2,746,388 |
| OVALTINE PRODUCTS | IL0039214 | Illinois | Transient Non-Community | 900,500 |
| AURORA | IL0894070 | Illinois | Community | 183,000 |
| JOLIET | IL1970450 | Illinois | Community | 160,000 |
| NAPERVILLE | IL0434670 | Illinois | Community | 156,406 |
| IL AMERICAN-CHAMPAIGN | IL0195300 | Illinois | Community | 150,000 |
| ROCKFORD | IL2010300 | Illinois | Community | 147,051 |
| IL AMERICAN-PEORIA | IL1435030 | Illinois | Community | 137,575 |
| IL AMERICAN-EAST ST LOUIS | IL1635040 | Illinois | Community | 131,368 |
| SPRINGFIELD | IL1671200 | Illinois | Community | 117,444 |
| ELGIN | IL0894380 | Illinois | Community | 114,797 |
| BALDWIN ASSN | IL0044958 | Illinois | Transient Non-Community | 108,000 |
| WAUKEGAN | IL0971900 | Illinois | Community | 87,149 |
| CICERO | IL0310510 | Illinois | Community | 83,000 |
| AQUA ILLINOIS-KANKAKEE | IL0915030 | Illinois | Community | 80,000 |
| BLOOMINGTON | IL1130200 | Illinois | Community | 77,610 |
| DECATUR | IL1150150 | Illinois | Community | 76,122 |
| SCHAUMBURG | IL0314890 | Illinois | Community | 75,750 |
| EVANSTON | IL0310810 | Illinois | Community | 74,486 |
| IL AMERICAN-WEST SUBURBAN | IL1974151 | Illinois | Community | 73,978 |
| ARLINGTON HEIGHTS | IL0314030 | Illinois | Community | 73,320 |
| PALATINE | IL0312340 | Illinois | Community | 70,875 |
| SKOKIE | IL0312880 | Illinois | Community | 66,422 |
| DES PLAINES | IL0310630 | Illinois | Community | 60,675 |
| ORLAND PARK | IL0312310 | Illinois | Community | 58,862 |
| OAK LAWN | IL0312220 | Illinois | Community | 58,362 |
| BERWYN | IL0310210 | Illinois | Community | 57,250 |
| TINLEY PARK | IL0314910 | Illinois | Community | 56,703 |
| OAK PARK | IL0312250 | Illinois | Community | 54,583 |
| WHEATON | IL0431050 | Illinois | Community | 53,970 |
| NORMAL | IL1130900 | Illinois | Community | 52,736 |
| ROMEOVILLE | IL1970900 | Illinois | Community | 50,458 |
| HOFFMAN ESTATES | IL0311290 | Illinois | Community | 50,179 |
| PLAINFIELD | IL1970800 | Illinois | Community | 50,000 |
| DOWNERS GROVE | IL0430300 | Illinois | Community | 49,425 |
| GLENVIEW | IL0311020 | Illinois | Community | 47,856 |
| O FALLON | IL1631100 | Illinois | Community | 46,603 |
| IL AMERICAN-ALTON | IL1195150 | Illinois | Community | 46,127 |
| ELMHURST | IL0430350 | Illinois | Community | 45,000 |
| DEKALB | IL0370100 | Illinois | Community | 45,000 |
| MOLINE | IL1610450 | Illinois | Community | 44,500 |
| LOMBARD | IL0430600 | Illinois | Community | 44,476 |
| BUFFALO GROVE | IL0314180 | Illinois | Community | 43,212 |
| QUINCY | IL0010650 | Illinois | Community | 42,000 |
| BARTLETT | IL0314120 | Illinois | Community | 41,500 |
| MOUNT PROSPECT | IL0311980 | Illinois | Community | 41,000 |
| CRYSTAL LAKE | IL1110150 | Illinois | Community | 40,661 |
| CAROL STREAM | IL0430200 | Illinois | Community | 39,854 |
| PARK RIDGE | IL0312460 | Illinois | Community | 39,800 |