Lake, IL
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Lake in Illinois · Population: 711,885
Lake, IL is tracked across three EPA datasets covering 43 Toxics Release Inventory (TRI) facilities, 88 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 66/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 1.6M lbs of reported toxic releases under EPCRA Section 313, while 30 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 40 and a peak AQI of 140 in 2024, with 82% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 201 (82%) | 39 | 5 | 140 |
| 2023 | 182 (75%) | 47 | 13 | 179 |
| 2022 | 199 (82%) | 41 | 2 | 159 |
| 2021 | 180 (74%) | 55 | 9 | 136 |
| 2020 | 199 (83%) | 31 | 10 | 185 |
Source: EPA Air Quality System (AQS) Annual AQI by County EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Illinois, see the EPA's AirNow.gov.
Water Systems (88)
| System | Population | Violations |
|---|---|---|
| WAUKEGAN | 87,149 | 2 |
| BUFFALO GROVE | 43,212 | 0 |
| VERNON HILLS - LAKE CO PW | 33,207 | 0 |
| MUNDELEIN | 31,500 | 0 |
| GURNEE | 30,193 | 0 |
| HIGHLAND PARK | 30,176 | 1 |
| ROUND LAKE BEACH | 27,200 | 0 |
| ZION | 24,442 | 0 |
| GREAT LAKES NAVAL TRAINING STATION | 23,000 | 0 |
| GRAYSLAKE | 21,248 | 2 |
| LIBERTYVILLE | 20,500 | 0 |
| LAKE ZURICH | 19,759 | 0 |
| LAKE FOREST | 19,642 | 5 |
| DEERFIELD | 19,196 | 1 |
| ROUND LAKE | 18,430 | 0 |
| NORTH CHICAGO | 16,813 | 9 |
| WILDWOOD SUBDIVISION - LAKE CO PW | 14,832 | 0 |
| LINDENHURST | 14,500 | 0 |
| ANTIOCH | 14,175 | 3 |
| WAUCONDA | 14,084 | 0 |
| WINNETKA | 12,475 | 0 |
| FOX LAKE | 11,780 | 1 |
| LAKE VILLA | 8,829 | 0 |
| BEACH PARK | 8,710 | 0 |
| ISLAND LAKE | 8,066 | 0 |
| LINCOLNSHIRE | 7,940 | 1 |
| VOLO | 6,629 | 2 |
| WINTHROP HARBOR | 6,565 | 0 |
| GRANDWOOD PARK SUBDIVISION - LAKE CO PW | 5,751 | 0 |
| LAKE BLUFF | 5,600 | 3 |
| PARK CITY | 5,425 | 0 |
| HIGHWOOD | 5,335 | 0 |
| ROUND LAKE PARK | 4,900 | 1 |
| LCPW - PEKARA SUBDIVISION | 3,711 | 0 |
| RIVERWOODS | 3,618 | 0 |
| HAINESVILLE | 3,528 | 3 |
| FOX LAKE HILLS SUBDIVISION - LAKE CO PW | 2,628 | 0 |
| ROUND LAKE HEIGHTS | 2,622 | 0 |
| SADDLEBROOK FARMS | 2,558 | 5 |
| PARK CITY MHP | 2,460 | 0 |
| HERSCHER | 1,600 | 0 |
| LCPW - BROOKS FARM SUBDIVISION | 1,563 | 0 |
| GREEN OAKS | 1,470 | 2 |
| TOWER LAKES | 1,372 | 1 |
| COUNTRYSIDE LAKE SUBDIVISION -LAKE CO PW | 1,287 | 0 |
| BANNOCKBURN | 1,013 | 2 |
| LAKE COUNTY PW- HAWTHORN WOODS | 675 | 0 |
| WEST SHORE PARK SUBDIVISION | 590 | 1 |
| LAKE VIEW MHP | 568 | 2 |
| HILLDALE MANOR SUBDIVISION | 414 | 1 |
| ALLENDALE ASSOCIATION | 400 | 1 |
| LCPW - HIGHLAND LAKE SUBDIVISION | 330 | 0 |
| SCHWERMANNS 2ND AND 3RD WTR BRD | 285 | 0 |
| FIELDS OF LONG GROVE | 267 | 0 |
| TANNERON BAY HOMEOWNERS ASSOCIATION | 256 | 2 |
| BROOKDALE SENIOR LIVING - VERNON HILLS | 225 | 0 |
| FOREST LAKE ADDITION - LAKE CO PW | 225 | 0 |
| HEIDEN GARDENS CONDOS | 217 | 0 |
| ALDEN LONG GROVE NURSING CENTER | 211 | 0 |
| SYLVAN LAKE 1ST SUBDIVISION | 210 | 0 |
| TOWNERS SUBDIVISION | 206 | 1 |
| AVANTARA LONG GROVE | 200 | 0 |
| DIAMOND LAKE MHP | 198 | 0 |
| PRAIRIE TRAILS OF LONG GROVE | 189 | 0 |
| WEST SHORELAND SUBDIVISION | 189 | 0 |
| WADSWORTH OAKS SUBDIVISION | 185 | 0 |
| DUCK LAKE WELL OWNERS ASSOCIATION | 141 | 1 |
| MOUNT ST JOSEPH SCHOOL ICF | 125 | 2 |
| VALLEY HI NURSING HOME | 125 | 0 |
| LAKE CO. PW - ARDEN SHORES ESTATES | 105 | 0 |
| CHAIN-O-LAKES MHP | 84 | 0 |
| PROMONTORY POINTE HOMEOWNERS ASSOCIATION | 78 | 0 |
| LONG GROVE | 70 | 0 |
| OTTAWA ESTATES MHP (FORMERLY DATTIS MHP) | 70 | 3 |
| GLENSTONE SBDV HOA | 65 | 0 |
| RIVER EAST VILLAGE MHP | 65 | 0 |
| NEW PERSPECTIVE SENIOR LIVING | 62 | 0 |
| SILVER OAK APTS | 60 | 1 |
| ELM OAK MUTUAL WATER SYSTEM | 50 | 2 |
| LCPW - OAK TERRACE | 45 | 0 |
| HOLY HILL APARTMENTS | 32 | 0 |
| DAYSPRING BIBLE COLLEGE | 30 | 0 |
| 337-9 HOLY HILL APARTMENTS LLC | 30 | 0 |
| WHISPERING PINES APTS | 30 | 4 |
| 425 HOLY HILL APTS | 28 | 0 |
| BLUFF LAKE LODGES, INC. | 24 | 1 |
| LAKE COUNTY PUBLIC WATER DISTRICT | 1 | 0 |
| CENTRAL LAKE COUNTY JAWA | 0 | 0 |
TRI Facilities (43)
Cities in Lake (15)
Frequently Asked Questions
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.