Lake County, Illinois
56 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| North Chicago | 16,813 | Surface Water | 21 | 9 |
| Lake Forest | 19,642 | Surface Water | 15 | 5 |
| Lake Bluff | 5,600 | Surface Water Purchased | 13 | 3 |
| Antioch | 14,175 | Groundwater | 10 | 3 |
| Hainesville | 3,528 | Groundwater | 6 | 3 |
| Lake Barrington Shores Subdivsion | 2,300 | Groundwater | 6 | 3 |
| Volo | 6,629 | Surface Water Purchased | 92 | 2 |
| Waukegan | 87,149 | Surface Water | 21 | 2 |
| Green Oaks | 1,470 | Surface Water Purchased | 7 | 2 |
| Bannockburn | 1,013 | Surface Water Purchased | 3 | 2 |
| Grayslake | 21,248 | Surface Water Purchased | 2 | 2 |
| Bluff Lake Lodges, Inc. | 24 | Groundwater | 30 | 1 |
| Deerfield | 19,196 | Surface Water Purchased | 16 | 1 |
| Round Lake Park | 4,900 | Surface Water Purchased | 14 | 1 |
| Tower Lakes | 1,372 | Groundwater | 4 | 1 |
| Fox Lake | 11,780 | Groundwater | 2 | 1 |
| Lincolnshire | 7,940 | Surface Water Purchased | 2 | 1 |
| Highland Park | 30,176 | Surface Water | 1 | 1 |
| Barrington | 10,327 | Groundwater | 1 | 1 |
| Winthrop Harbor | 6,565 | Surface Water Purchased | 66 | 0 |
| Lindenhurst | 14,500 | Surface Water Purchased | 34 | 0 |
| Park City | 5,425 | Surface Water Purchased | 26 | 0 |
| Cambridge Courts Mhp | 658 | Surface Water Purchased | 25 | 0 |
| The Preserve at Long Grove | 204 | Groundwater | 21 | 0 |
| Riverwoods | 3,618 | Surface Water Purchased | 15 | 0 |
| Beach Mhp | 624 | Surface Water Purchased | 15 | 0 |
| Park City Mhp | 2,460 | Surface Water Purchased | 14 | 0 |
| Dayspring Bible College | 30 | Groundwater | 13 | 0 |
| Mundelein | 31,500 | Surface Water Purchased | 12 | 0 |
| Lake Bluff Estates Mhp | 165 | Groundwater | 12 | 0 |
| Gurnee | 30,193 | Surface Water Purchased | 11 | 0 |
| Round Lake Beach | 27,200 | Surface Water Purchased | 11 | 0 |
| Lake Villa | 8,829 | Surface Water Purchased | 10 | 0 |
| Lake Zurich | 19,759 | Groundwater | 8 | 0 |
| Royal Melbourne Homeowners Asn | 382 | Groundwater | 8 | 0 |
| Round Lake | 18,430 | Surface Water Purchased | 6 | 0 |
| Vernon Hills - Lake Co Pw | 33,207 | Surface Water Purchased | 5 | 0 |
| Zion | 24,442 | Surface Water Purchased | 5 | 0 |
| Long Grove | 70 | Groundwater | 5 | 0 |
| Highwood | 5,335 | Surface Water | 4 | 0 |
| Lakemoor | 2,720 | Groundwater | 4 | 0 |
| Avantara Long Grove | 200 | Groundwater | 4 | 0 |
| Promontory Pointe Homeowners Association | 78 | Groundwater | 4 | 0 |
| Round Lake Heights | 2,622 | Surface Water Purchased | 3 | 0 |
| Beach Park | 8,710 | Surface Water Purchased | 2 | 0 |
| Lake County Pw- Hawthorn Woods | 675 | Groundwater Purchased | 2 | 0 |
| Alden Long Grove Nursing Center | 211 | Groundwater | 2 | 0 |
| Great Lakes Naval Training Station | 23,000 | Surface Water | 1 | 0 |
| Wauconda | 14,084 | Surface Water Purchased | 1 | 0 |
| Brookdale Senior Living - Vernon Hills | 225 | Surface Water Purchased | 1 | 0 |
| Libertyville | 20,500 | Surface Water Purchased | 0 | 0 |
| Island Lake | 8,066 | Groundwater | 0 | 0 |
| Lake Barrington | 500 | Groundwater | 0 | 0 |
| New Perspective Senior Living | 62 | Groundwater | 0 | 0 |
| Lcpw - Oak Terrace | 45 | Groundwater | 0 | 0 |
| Central Lake County Jawa | 0 | Surface Water | 0 | 0 |