| A-1-Eco Lindsay Water Treatmen | 815-725-2122 | 2016 N Plainfield Rd | Joliet | IL | 60435 |
| Alton Irrigation Co | 815-438-2730 | 8096 Luther Rd | Rock Falls | IL | 61071 |
| American Water Treatment Inc | 815-282-9595 | 7300 Edward Dr | Loves Park | IL | 61111 |
| Amway Distributors | 815-741-2294 | 1405 Lemorr Ave | Joliet | IL | 60435 |
| Apple River Well & Pump Co | 815-591-2131 | 8350 S Whitton Rd | Hanover | IL | 61041 |
| Aqua Clear Water Treatment Systems | 815-385-0542 | 2203 Coolidge Ave | Mc Henry | IL | 60050 |
| Aqua Tech | 815-288-6808 | 1250 N Galena Ave | Dixon | IL | 61021 |
| Aqua-Mist Water Conditioners | 815-877-4097 | 5028 N 2nd St | Rockford | IL | 61100 |
| Aquatech Water Filtration Co | 815-464-5717 | 20523 S Oakwood Dr | Frankfort | IL | 60423 |
| Bill & Jim Pump Service | 815-398-9894 | 3210 Bildahl St | Rockford | IL | 61109 |
| Blackhawk Well Drilling | 815-234-3106 | 6860 Alpine Dr | Byron | IL | 61010 |
| Bonnie Brae-Forest Manor Sanit | 815-838-8444 | 1113 Highland Ave | Lockport | IL | 60441 |
| Bull Jack D Well Drill Drilling & Pump | 815-968-4644 | 1509 N Horace Ave | Rockford | IL | 61101 |
| Certified Consultants Ltd | 815-338-3947 | 3904 Wilson Rd | Woodstock | IL | 60098 |
| Certified Water Conditioning | 815-625-6448 | 1809 21st Ave | Sterling | IL | 61081 |
| Community Service Corp | 815-385-7797 | 2407 Driftwood Dr | Mc Henry | IL | 60050 |
| Complete Water System Specialists | 815-485-4800 | 1200 S Cedar Rd | New Lenox | IL | 60451 |
| Consumer Illinois Water-Boone County | 815-765-2578 | 2026 Candlewick Dr SW | Poplar Grove | IL | 61065 |
| Consumers Illinois Water Co Customer Svc Emerg | 815-935-8800 | 1000 S Schuyler Ave | Kankakee | IL | 60901 |
| Country Well & Pump Co | 815-476-9736 | 1200 S Cedar Rd | New Lenox | IL | 60451 |
| Crystal Clear Water Co | 815-653-2961 | 7314 Hancock Dr | Wonder Lake | IL | 60097 |
| Culligan Water Conditiong | 815-459-7423 | 257 King St | Crystal Lake | IL | 60014 |
| Culligan Water Conditioning | 815-932-2741 | 428 Frontage Rd | Bourbonnais | IL | 60922 |
| Dr Stillwater Co | 815-654-2801 | 11065 Raleigh Ct | Machesney Park | IL | 61115 |
| Dvoraks Durastill Inc | 815-932-7832 | 770 Bunker Hill Dr | Bourbonnais | IL | 60914 |
| Eastwood Manor Water Co | 815-385-8751 | 1605 Park St | Mc Henry | IL | 60050 |
| Ecowater Systems | 815-877-7638 | 6206 Forest Hills Rd | Loves Park | IL | 61111 |
| Hess R L Co | 815-947-2426 | 201 W Front Ave | Stockton | IL | 61085 |
| Hinkle J & J Well Drilling & Septic | 815-633-3214 | 5289 Harlem Rd | Rockford | IL | 61100 |
| Home Water Systems | 815-356-5539 | 8411 Pyott Rd | Lake In The Hills | IL | 60102 |
| Iwt Co-Illinois Water Treatment | 815-877-3041 | 4669 Shepherd Trl | Rockford | IL | 61103 |
| Joliet Water Reconditioning Co | 815-439-1813 | 2401 Von Esch Rd | Plainfield | IL | 60544 |
| Jones B & J & Son Sales & Service Wtr Filtrtn | 815-625-8328 | 2205 Canal St | Rock Falls | IL | 61071 |
| La Salle County Water Specialist | 815-433-5297 | 102 W Madison St | Ottawa | IL | 61350 |
| Lakewood Shores Improvement Assoc | 815-476-7001 | 303 Bass St | Wilmington | IL | 60481 |
| Matthesius Phyllis Ofc | 815-385-5252 | 3200 N Richmond Rd | Mc Henry | IL | 60050 |
| Mayfresh Water Treatment | 815-397-1075 | 1516 Bway Rcfr | Rockford | IL | 61100 |
| Mc Guire Well & Pump | 815-485-3302 | 215 S Cedar Rd | New Lenox | IL | 60451 |
| Mc Henry Shores Water Company | 815-344-1866 | 7314 Hancock Dr | Wonder Lake | IL | 60097 |
| Mchenry Analytical Water Laboratory | 815-344-4044 | 4314 W Crystal Lake Rd | Mc Henry | IL | 60050 |
| Midwest Irrigation Co | 815-747-3359 | 8080 Dunleith Dr | East Dubuque | IL | 61025 |
| Nestle Distribution Center | 815-754-2550 | 800 Nestle Ct | De Kalb | IL | 60115 |
| Northern Illinois Water Corp Ofc | 815-672-2243 | 122 S Sterling St | Streator | IL | 61364 |
| Northern Illinois Water Corp Ofc | 815-672-4556 | 120 S Sterling St | Streator | IL | 61364 |
| Northern Illinois Water Corporation Ofc | 815-625-0017 | 304 2nd Ave | Sterling | IL | 61081 |
| Ottawa Water Systems | 815-434-5426 | 410 E Stevenson Rd | Ottawa | IL | 61350 |
| Park Crest Water Co | 815-235-6062 | 320 N Park Blvd | Freeport | IL | 61032 |
| Petersons Watercare Service | 815-725-0390 | 1950 Leness Ln | Joliet | IL | 60435 |
| Plano Soft Water Treatment Company Inc | 815-633-0777 | 1145 Power Rd | Rockford | IL | 61100 |
| Quality Water Conditioning | 815-338-3344 | 711 Amsterdam St | Woodstock | IL | 60098 |
| Rainmakers Irrigation & Mainte | 815-436-5455 | 12024 S Aero Dr | Plainfield | IL | 60544 |
| Rix Well & Pump Service | 815-357-8815 | Grand Ridge Rd | Seneca | IL | 61360 |
| Trausch Distributing | 815-747-3273 | 18105 US Highway 20 W | East Dubuque | IL | 61025 |
| Velvet Soft Industries | 815-935-5390 | 337 W Bway | Bradley | IL | 60915 |
| Water Inc | 815-626-8844 | 2404 Locust St | Sterling | IL | 61081 |
| Wildwood Utility Co Pumping Station | 815-226-1804 | 6514 Harrison Av | Rockford | IL | 61104 |
