Jefferson, CO
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 Jefferson in Colorado · Population: 579,715
Jefferson, CO is tracked across three EPA datasets covering 19 Toxics Release Inventory (TRI) facilities, 102 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 50/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 1.7M lbs of reported toxic releases under EPCRA Section 313, while 24 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 50 and a peak AQI of 174 in 2024, with 52% 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 | 192 (52%) | 137 | 30 | 174 |
| 2023 | 206 (56%) | 141 | 18 | 143 |
| 2022 | 234 (64%) | 100 | 30 | 166 |
| 2021 | 222 (61%) | 88 | 44 | 172 |
| 2020 | 231 (63%) | 108 | 23 | 161 |
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 Colorado, see the EPA's AirNow.gov.
Water Systems (102)
| System | Population | Violations |
|---|---|---|
| WESTMINSTER CITY OF | 202,078 | 0 |
| ARVADA CITY OF | 171,610 | 0 |
| CONSOLIDATED MUTUAL MAPLE GROVE | 81,400 | 0 |
| GREEN MOUNTAIN WSD | 49,400 | 3 |
| SOUTHWEST METROPOLITAN WSD | 48,648 | 0 |
| BANCROFT CLOVER WSD | 44,000 | 0 |
| GOLDEN CITY OF | 38,288 | 0 |
| BEAR CREEK WSD | 30,000 | 0 |
| PLATTE CANYON WSD | 19,485 | 0 |
| KEN CARYL WSD | 12,000 | 0 |
| LAKEHURST WSD | 12,000 | 0 |
| NORTH TABLE MOUNTAIN WSD | 10,000 | 0 |
| VALLEY WD | 10,000 | 0 |
| MORRISON TOWN OF | 9,887 | 0 |
| WILLOWBROOK WSD | 9,348 | 0 |
| LAKEWOOD CITY OF | 6,000 | 0 |
| EDGEWATER CITY OF | 5,300 | 0 |
| HIGH VIEW WD | 4,000 | 0 |
| GENESEE WSD | 3,920 | 0 |
| MEADOWBROOK WD | 3,290 | 0 |
| WIKIUP MHP | 2,500 | 0 |
| ALAMEDA WSD | 2,480 | 0 |
| KIMBERLY HILLS MHP | 2,005 | 1 |
| MOUNTAIN WSD | 1,941 | 3 |
| PINE LAKES RANCH | 1,905 | 0 |
| SPRING VALLEY MD NO 1 | 1,788 | 0 |
| FRIENDLY VILLAGE OF AURORA MHP | 1,786 | 0 |
| RALSTON VALLEY WSD | 1,610 | 0 |
| HILLCREST VILLAGE MHP | 1,505 | 0 |
| REDWOOD ESTATES | 1,500 | 0 |
| LOOKOUT MOUNTAIN WD | 1,378 | 41 |
| INDIAN HILLS WD | 1,300 | 6 |
| GREATROCK NORTH WSD | 1,250 | 0 |
| CANTERBURY PARK | 1,240 | 0 |
| THE SPRINGS MHP | 1,229 | 0 |
| HARMONY VILLAGE MHP | 1,215 | 0 |
| DENVER CASCADE MHP | 1,200 | 1 |
| HOLIDAY HILLS VILLAGE | 1,190 | 0 |
| STONEYBROOK MHP | 1,073 | 0 |
| CIMARRON VILLAGE | 1,010 | 0 |
| LONGVIEW MHP | 1,000 | 0 |
| BOW MAR WSD | 899 | 0 |
| COUNTRYSIDE VILLAGE OF DENVER | 863 | 0 |
| COLUMBINE LAKES HOA | 843 | 0 |
| VILLA WEST | 833 | 0 |
| GOLDEN TERRACE WEST | 825 | 1 |
| DEER CREEK WD | 792 | 2 |
| COUNTRYSIDE OF LONGMONT | 775 | 0 |
| THE MEADOWS | 758 | 0 |
| FRIENDLY VILLAGE OF GREELEY MHP | 660 | 1 |
| LAMPLIGHTER MHP | 651 | 0 |
| LAMPLIGHTER RHP | 643 | 0 |
| CANYON RIDGE | 625 | 0 |
| GOLDEN TERRACE VILLAGE | 580 | 1 |
| ST VRAIN MHP LLC | 544 | 0 |
| CRESTLINE MANOR | 505 | 0 |
| PUEBLO GRANDE VILLAGE | 504 | 0 |
| SHERIDAN MHP | 480 | 0 |
| MOUNTAINSIDE ESTATES MHP | 473 | 2 |
| MESA CORTINA WSD | 466 | 0 |
| ST MARYS GLACIER WSD | 451 | 16 |
| HIGH CLIFF ESTATES | 448 | 0 |
| COUNTRYSIDE OF GREELEY | 435 | 0 |
| SADDLEBACK RV | 425 | 0 |
| GOLDEN TERRACE SOUTH | 425 | 1 |
| FOREST HILLS MD RIVA CHASE | 400 | 0 |
| REDHILL FOREST POMWACA | 388 | 0 |
| STONEYBROOK POINTE | 355 | 0 |
| BLUE MOUNTAIN WD | 350 | 0 |
| IDLEDALE WSD | 350 | 1 |
| BONVUE WATER AND SANITATION DISTRICT | 350 | 0 |
| GREEN ACRES MHP | 325 | 1 |
| ELDORADO MUNICIPAL SYSTEM | 308 | 1 |
| THORNTON ESTATES | 300 | 0 |
| COUNTRY ESTATES MOBILE HOME PARK | 297 | 0 |
| TERRACE PARK MHP | 297 | 3 |
| PLEASANT GROVE MHP | 285 | 0 |
| LOVELAND MHP | 283 | 0 |
| GRAND MEADOW OF LONGMONT MHP | 255 | 0 |
| GARDEN MEADOWS | 250 | 0 |
| OLDE STAGE WD | 250 | 0 |
| ELEVADO ESTATES LLC | 250 | 0 |
| INSPIRATION VALLEY MHP | 250 | 0 |
| MAJESTIC MHP | 232 | 0 |
| SEDALIA WSD | 215 | 4 |
| RIVERDALE PEAKS II MD | 209 | 0 |
| LAFAYETTE GARDENS | 207 | 0 |
| BARR LAKE RVP | 204 | 0 |
| GRANBY JONES MHP | 201 | 0 |
| SHADY LANE MHP | 165 | 0 |
| 4 WAY RANCH MD 2 | 150 | 2 |
| BELLA VISTA | 131 | 0 |
| COMMERCE HEIGHTS | 130 | 0 |
| BUFFALO CREEK WD | 125 | 7 |
| SIERRA BONITA ESTATES | 122 | 1 |
| SIERRA VISTA HOA | 120 | 0 |
| BUFFALO RIDGE ESTATES | 90 | 0 |
| RIVER-DALE RANCH | 83 | 0 |
| TABLE MESA VILLAGE MHP | 75 | 21 |
| GRACE MAR WUA | 50 | 0 |
| SHAWNEE WCA | 50 | 3 |
| ARAPAHOE MHP | 27 | 2 |
TRI Facilities (19)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Ball Metal Beverage Container Corp | 552.1K lbs |
| 2 | Molson Coors USA LLC - Golden Brewery | 532.3K lbs |
| 3 | Rocky Mountain Metal Container | 393.1K lbs |
| 4 | Advanced Surface Technologies Inc | 161.1K lbs |
| 5 | Cf Maier Composites Inc | 7.4K lbs |
| 6 | Terumo Bct Sterilization Services Inc | 7.3K lbs |
| 7 | Lockheed Martin Space | 1.0K lbs |
| 8 | Rocky Mountain Bottle Co | 460 lbs |
| 9 | Martin Marietta Spec Agg | 246 lbs |
| 10 | Livanova | 150 lbs |
| 11 | Ttm Technologies | 73 lbs |
| 12 | Usda Forest Service Jefferson County Air Tanker Ba | 63 lbs |
| 13 | Coorstek | 55 lbs |
| 14 | Smyrna Ready Mix Concrete LLC - Arvada Ready Mix | 1 lbs |
| 15 | Smyrna Ready Mix Concrete LLC - Spec Agg Ready Mix | 0 lbs |
| 16 | Burnco Colorado LLC - Jeffco | 0 lbs |
| 17 | Lakewood Brick & Tile Co. | 0 lbs |
| 18 | Electro-Mechanical Products Inc | 0 lbs |
| 19 | Sundyne LLC | 0 lbs |
Cities in Jefferson (5)
Frequently Asked Questions
What is the environmental risk level in Jefferson, Colorado? ▼
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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.