Lake County, Illinois
SDWIS compliance plate
Sheet IL097 · Lake County 540 sys · 33,311 viol · #95/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-LARGE · BOOK-FULL
- VIOL-SEVERE 70.4% flagged
- HEALTH-LOW 7.6% health
- RANK-TOP #95/3254
- PHOTO-FINISH ±0.1 pp
- PFAS-LOW 8.3% detect
- SRC-GW GW lead 89%
- SYS-LARGE 540 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Cook County (+ 0.1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Lake County ranks #95 of 3,254 counties by people served, and #3 of 102 counties in Illinois. See methodology · corpus placement.
Lake County standing, lower-flagged corpus third
Flagged-system rate 70.4% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 7.6% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 8.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #95 of 3,254 · #3 of 102 in Illinois.
Flagged-rate neighbourhood around Lake County
Lowest/highest poles plus in-state counties nearest Lake County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Waukegan | 87,149 | 118 | Clean |
| Vernon Hills - Lake Co Pw | 33,207 | 64 | Clean |
| Mundelein | 31,500 | 77 | Clean |
| Gurnee | 30,193 | 68 | Clean |
| Highland Park | 30,176 | 16 | Clean |
| Round Lake Beach | 27,200 | 38 | Clean |
| Zion | 24,442 | 21 | Clean |
| Great Lakes Naval Training Station | 23,000 | 38 | Clean |
| Grayslake | 21,248 | 33 | Clean |
| Libertyville | 20,500 | 27 | Detected |
| Lake Zurich | 19,759 | 260 | Detected |
| Lake Forest | 19,642 | 33 | Clean |
| Deerfield | 19,196 | 44 | Clean |
| Round Lake | 18,430 | 33 | Clean |
| North Chicago | 16,813 | 154 | Clean |
| Wildwood Subdivision - Lake Co Pw | 14,832 | 53 | Clean |
| Lindenhurst | 14,500 | 89 | Clean |
| Antioch | 14,175 | 115 | Clean |
| Wauconda | 14,084 | 29 | Clean |
| Captain James a Lovell Fhcc | 12,100 | 98 | Clean |
| Fox Lake | 11,780 | 49 | Detected |
| Barrington | 10,327 | 16 | Clean |
| Lake Villa | 8,829 | 75 | Clean |
| Beach Park | 8,710 | 8 | Clean |
| Island Lake | 8,066 | 10 | Clean |
| Lincolnshire | 7,940 | 17 | Clean |
| Volo | 6,629 | 136 | Clean |
| Winthrop Harbor | 6,565 | 102 | Clean |
| Grandwood Park Subdivision - Lake Co Pw | 5,751 | 61 | Clean |
| Lake Bluff | 5,600 | 49 | Clean |
| Park City | 5,425 | 52 | Clean |
| Highwood | 5,335 | 37 | Clean |
| Round Lake Park | 4,900 | 30 | Clean |
| Lcpw - Pekara Subdivision | 3,711 | 5 | Clean |
| Riverwoods | 3,618 | 27 | Clean |
| Hainesville | 3,528 | 107 | Clean |
| Aqua Illinois-Hawthorn Woods | 3,065 | 23 | - |
| Highland Park Hospital | 2,800 | 53 | - |
| Lakemoor | 2,720 | 5 | - |
| Fox Lake Hills Subdivision - Lake Co Pw | 2,628 | 11 | - |
| Round Lake Heights | 2,622 | 6 | - |
| Saddlebrook Farms | 2,558 | 50 | - |
| Baxter Health Care/Hanline | 2,500 | 23 | - |
| Park City MHP | 2,460 | 30 | - |
| Lake Barrington Shores Subdivsion | 2,300 | 216 | - |
| Aqua Illinois-Rockwell | 1,762 | 71 | - |
| Lcpw - Brooks Farm Subdivision | 1,563 | 2 | - |
| Green Oaks | 1,470 | 24 | - |
| Wynstone Water Company | 1,424 | 318 | - |
| Tower Lakes | 1,372 | 208 | - |
Compare beyond Illinois
Lower-flagged peers for Lake County
Cross-state counties nearest Lake County on flagged-system share (70.4%) and cumulative violation count (33,311). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.