Douglas, CO
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 Douglas in Colorado · Population: 368,283
TRI sites such as Holcim Wcr Inc Centennial Ready Mix Plant; Holcim Wcr Inc Castle Rock Ready Mix Plant; Holcim Wcr Inc Franktown Ready Mix Plant; SDWIS systems such as CASTLE ROCK TOWN OF; HIGHLANDS RANCH WSD; PARKER WSD anchor Douglas, CO's EPA extract. Derived burden score 37/100 (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 Douglas include ROXBOROUGH WSD; PINERY WWD; ACADEMY WSD, while Holcim Wcr Inc Centennial Ready Mix Plant leads reported TRI pounds among local Form R filers. AQS median AQI 48 / peak 166 in 2024.
Burden score 37/100 (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 Douglas -- 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 Douglas, CO: EPA TRI 2023 reporting year
Same facilities, both years
-94.3%
11 facilities that filed in 2022 and 2023
Whole inventory
-94.4%
31.3 thousand lb → 1.8 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Douglas, CO's total reported releases fell from 31.0 thousand lb in 2022 to 1.8 thousand lb in 2023, based on EPA TRI filings.
- Douglas, CO's air releases fell from 29.7 thousand lb in 2022 to 171 lb in 2023, based on EPA TRI filings.
- Douglas, CO's chemicals reported fell from 10 in 2022 to 7 in 2023, based on EPA TRI filings.
- Douglas, CO's land releases rose from 1.3 thousand lb in 2022 to 1.6 thousand lb in 2023, based on EPA TRI filings.
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 | 208 (57%) | 130 | 21 | 166 |
| 2023 | 200 (55%) | 149 | 14 | 177 |
| 2022 | 242 (66%) | 105 | 17 | 169 |
| 2021 | 195 (54%) | 121 | 34 | 177 |
| 2020 | 221 (61%) | 123 | 14 | 159 |
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 (23)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CASTLE ROCK TOWN OF | 110,298 | 0 |
| HIGHLANDS RANCH WSD | 103,444 | 0 |
| PARKER WSD | 75,949 | 0 |
| STONEGATE MD | 15,295 | 0 |
| ROXBOROUGH WSD | 13,765 | 3 |
| PINERY WWD | 12,901 | 1 |
| CASTLE PINES NORTH MD | 12,800 | 0 |
| STERLING RANCH CAB | 11,501 | 0 |
| CASTLE PINES VILLAGE MD | 5,656 | 0 |
| PERRY PARK WSD | 3,890 | 0 |
| CONSOLIDATED BELL MTN RANCH MD | 1,162 | 0 |
| BROOK FOREST WD | 998 | 0 |
| ROXBOROUGH NW DOUGLAS COUNTY | 860 | 0 |
| ACADEMY WSD | 750 | 1 |
| THUNDERBIRD WSD | 490 | 0 |
| KINGSWOOD PLAZA MHC LLC | 450 | 0 |
| BEVERLY HILLS MUTUAL WC | 325 | 1 |
| SILVER HEIGHTS WSD | 301 | 0 |
| LARKSPUR TOWN OF | 275 | 20 |
| NORTHWAY MHP | 250 | 2 |
| LOUVIERS WSD | 238 | 35 |
| EAST VALLEY MD | 230 | 0 |
| VIEW RIDGE MUTUAL WC | 35 | 2 |
TRI Facilities (12)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Holcim Wcr Inc Centennial Ready Mix Plant | 32.2K lbs |
| 2 | Holcim Wcr Inc Castle Rock Ready Mix Plant | 482 lbs |
| 3 | Holcim Wcr Inc Franktown Ready Mix Plant | 475 lbs |
| 4 | Holcim Wcr Inc Riverview Ready Mix Plant | 298 lbs |
| 5 | Oldcastle Precast Inc | 49 lbs |
| 6 | Smyrna Ready Mix Concrete LLC - Titan Ready Mix | 4 lbs |
| 7 | Smyrna Ready Mix Concrete LLC - Castle Rock Ready Mix | 2 lbs |
| 8 | Foley Products Co - Littleton | 0 lbs |
| 9 | Burnco Colorado LLC - Titan | 0 lbs |
| 10 | Ready Mixed Concrete - Plant 13 | 0 lbs |
| 11 | Best Block - Denb | 0 lbs |
| 12 | Elkhart Plastics Inc. | 0 lbs |
Cities in Douglas (7)
Frequently Asked Questions
What is the environmental risk level in Douglas, Colorado? ▼
Are there Superfund sites in Douglas? ▼
How many toxic release facilities are in Douglas? ▼
What is the air quality in Douglas? ▼
Is the drinking water safe in Douglas? ▼
What environmental agencies cover Douglas? ▼
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.