PlainEnviro

Arapahoe, CO

Moderate Risk (38/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.

Environmental data for Arapahoe in Colorado · Population: 655,709

TRI sites such as Unicircuit Inc; Dfa Dairy Brands Fluid LLC D/b/a Meadow Gold Dairy; U.S. Dod Usaf Buckley Sfb Co; SDWIS systems such as AURORA CITY OF; EAST CHERRY CREEK VALLEY WSD; ENGLEWOOD CITY OF; NPL sites such as Lowry Landfill anchor Arapahoe, CO's EPA extract. Derived burden score 38/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Arapahoe include ENGLEWOOD CITY OF; ADVENIR FRENCH QUARTER; SOUTH SHERIDAN WATER AND SEWER DIST, while Unicircuit Inc leads reported TRI pounds among local Form R filers. AQS median AQI 49 / peak 161 in 2024.

Burden score 38/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Arapahoe -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Release-over-release change

What changed for Arapahoe, CO: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-42.2%

5 facilities that filed in 2022 and 2023

Whole inventory

-42.2%

7.7 thousand lb → 4.5 thousand lb, every facility that filed

  • Arapahoe, CO's total reported releases fell from 7.7 thousand lb in 2022 to 4.5 thousand lb in 2023, based on EPA TRI filings.
  • Arapahoe, CO's air releases rose from 28 lb in 2022 to 57 lb in 2023, based on EPA TRI filings.
  • Arapahoe, CO's land releases fell from 65 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
  • Arapahoe, CO's off-site transfers fell from 7.6 thousand lb in 2022 to 4.4 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
655,709
TRI Facilities
7
Water Systems
54
Superfund Sites
1
Total Releases
31.2K lbs

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 196 (54%) 153 15 161
2023 239 (65%) 118 8 136
2022 237 (65%) 116 12 129
2021 220 (60%) 108 34 161
2020 243 (66%) 112 9 159
2024 Good Air Quality: 54% of days
Unhealthy days: 17
Median AQI: 49

Source: 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 (54)

System System pop (SDWIS) Violations
AURORA CITY OF 533,407 0
EAST CHERRY CREEK VALLEY WSD 66,130 0
ENGLEWOOD CITY OF 57,332 1
SOUTHGATE WSD 55,000 0
ARAPAHOE CNTY WWWA 31,000 0
MERIDIAN MD 23,415 0
WILLOWS WD 19,000 0
COTTONWOOD WSD 10,867 0
INVERNESS WSD 8,140 0
NORTHERN DOUGLAS COUNTY WSD 6,160 0
ADVENIR FRENCH QUARTER 3,447 1
SOUTH SHERIDAN WATER AND SEWER DIST 2,500 2
RANGEVIEW MD 2,487 0
DEER TRAIL TOWN OF 1,648 0
EAGLE RIVER VILLAGE MHP 1,500 0
FOXRIDGE FARMS MHP 1,440 0
NORTHBROOK VILLAS MHC 1,052 0
POUDRE VALLEY MHC 985 0
COLLINS AIRE MHC 946 0
LAGO VISTA MOBILE HOME PARK 842 0
RIVER VALLEY MHC 803 0
FOREST VIEW ACRES WD 772 6
MT VERNON COUNTRY CLUB 734 10
SKYLINE VILLAGE MOBILE HOME PK 700 2
ELKHORN RANCH MD NO 1 530 0
FRANKLIN MOBILE HOME PARK 513 0
EL MORRO MOBILE ESTATES 504 3
LAKE FORK MHP 487 0
SUNSET PARK MHC 462 0
WESTERN HILLS MHP 450 0
AVILLA EASTLAKE 410 3
APPLE & CHERRY RIDGE VILLAGE 350 1
THE ASPENS MOBILE HOME VILLAGE 318 1
CHAPARRAL VILLAGE MHP 303 0
ASPEN RIDGE MHC 302 0
PRAIRIE WC 300 0
EMERALD ACRES MOBILE HOME PARK 280 0
THE RINCON WATER COOPERATIVE 276 0
PRAIRIE VIEW POA 175 1
TRAVOIS HOA 175 2
STAGE RUN HOA 150 0
KEN CARYL WEST RANCH WD 140 0
GALAMBS MOBILE HOME AND RV PARK 130 6
CEDAR VILLAGE MHP 130 0
MEADOWLARK MOBILE HOME PARK 125 1
NORTH BREEZE MHP 123 1
W BAR K MOBILE HOME PARK 110 0
ALPINE VILLAGE MHP 80 27
WESTERN INN MHP 72 0
KEETON RANCH WATER 70 1
MOUNTAIN SHADOWS MOBILE ESTATES 45 26
JOINT WATER PURIFICATION PLANT 0 0
WISE PROJECT 0 0
DOMINION WSD 0 0

TRI Facilities (7)

# Facility Total Releases
1 Unicircuit Inc 25.2K lbs
2 Dfa Dairy Brands Fluid LLC D/b/a Meadow Gold Dairy 3.6K lbs
3 U.S. Dod Usaf Buckley Sfb Co 2.0K lbs
4 American Stainless Steel Corp 250 lbs
5 Safety-Kleen Systems Englewood (eco) 12 lbs
6 Brannan Ready Mix - South Ready Mix 0 lbs
7 Stolle Machineryco Englewood 0 lbs

Superfund Sites (1)

Site Name Status HRS Score
Lowry Landfill NPL Site 48.36

Cities in Arapahoe (6)

Littleton
10 facilities · 25 water
Englewood
6 facilities · 6 water
Centennial
0 facilities · 12 water
Greenwood Village
0 facilities · 10 water
Watkins
0 facilities · 3 water
Arapahoe County
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Arapahoe, Colorado? ▼
Arapahoe, CO has an environmental risk score of 38/100 (Moderate Risk), based on 7 TRI facilities, 1 Superfund sites, and 54 water systems on record. 18 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Arapahoe? ▼
Yes, Arapahoe, CO has 1 Superfund site on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in Arapahoe? ▼
Arapahoe, CO has 7 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 31.2K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Arapahoe? ▼
In 2024, Arapahoe, CO recorded a median AQI of 49 and a peak AQI of 161. 54% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Arapahoe? ▼
Arapahoe, CO has 54 EPA-regulated water systems. 18 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Arapahoe? ▼
Environmental compliance in Arapahoe, Colorado is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Colorado state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

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.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro