Delta, 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 Delta in Colorado · Population: 31,353
SDWIS systems such as DELTA CITY OF; ORCHARD CITY TOWN OF; UPPER SURFACE CREEK DOMESTIC WUA anchor Delta, CO's EPA extract. Derived burden score 15/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
No TRI Form R facilities sit in Delta in this extract; water coverage still lists DELTA CITY OF; ORCHARD CITY TOWN OF; UPPER SURFACE CREEK DOMESTIC WUA. AQS monitors logged median AQI 44 / peak 80 in 2022.
Burden score 15/100 (Low 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 Delta -- 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.
Air Quality History (2020–2022)
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 |
|---|---|---|---|---|
| 2022 | 125 (87%) | 18 | 0 | 80 |
| 2021 | 294 (81%) | 69 | 2 | 141 |
| 2020 | 312 (85%) | 53 | 0 | 97 |
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 (48)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| DELTA CITY OF | 8,700 | 0 |
| ORCHARD CITY TOWN OF | 3,100 | 0 |
| UPPER SURFACE CREEK DOMESTIC WUA | 2,800 | 31 |
| PAONIA TOWN OF | 2,499 | 8 |
| CEDAREDGE TOWN OF | 2,400 | 0 |
| HOTCHKISS TOWN OF | 2,050 | 3 |
| ROGERS MESA WC | 840 | 2 |
| DECATUR MHP, LLC | 500 | 0 |
| CEDAR MOUNTAIN VILLAGE MHP | 475 | 0 |
| BONE MESA DOMESTIC WD | 400 | 20 |
| CV LARAMIE MHP, LLC | 375 | 1 |
| RAMBLEWOOD MOBILE HOME PARK | 350 | 1 |
| FRUITLAND DOMESTIC WC | 335 | 10 |
| PITKIN MESA PIPELINE CO | 295 | 9 |
| HANSON MESA DOMESTIC PIPELINE CO INC | 250 | 0 |
| STEWART MESA WC | 250 | 0 |
| LAMPLIGHTER ESTATES MHP | 250 | 0 |
| ILDU LEPERE MHP, LLC | 250 | 0 |
| DUNCANSVILLE MHP LLC | 250 | 0 |
| HESPERIA MHP LLC | 248 | 0 |
| COALBY DOMESTIC WC | 239 | 25 |
| OAK GROVE MOBILE HOME PARK | 213 | 2 |
| LA VIDA MISSION COMMUNITY WATER SUPPLY | 200 | 14 |
| LAZEAR DOMESTIC WC | 178 | 4 |
| CLOVERLEAF MOBILE HOME PARK | 175 | 0 |
| MIDWAY VILLAGE MOBILE HOME PARK | 160 | 3 |
| TRINIDAD MANUFACTURED HOME COMMUNITY | 133 | 0 |
| HIDDEN VALLEY HOA WATER COMPANY | 120 | 2 |
| APACHE MHP | 120 | 0 |
| BREEZY KNOLL COMMUNITY | 116 | 0 |
| CHERRY ACRES MHP | 95 | 0 |
| VALLEY WEST PARK | 93 | 0 |
| MAZOMANIE MHP | 85 | 0 |
| OCONTO FALLS MHP | 80 | 0 |
| SUNSHINE ACRES MHP | 78 | 0 |
| SUNSHINE MESA DOMESTIC WC | 76 | 0 |
| MINNESOTA PIPELINE | 72 | 1 |
| HAMMOND PIPELINE | 70 | 0 |
| GINTERS GROVE DOMESTIC WATER CORP | 62 | 0 |
| WEST PAONIA DOMESTIC WATER COMPANY | 57 | 1 |
| SOUTH LAMBORN MESA WATER COMPANY | 47 | 1 |
| RIVERWOOD MOBILE HOME PARK | 37 | 0 |
| WESTERN EXTENSION DOMESTIC WATER COMPANY | 37 | 0 |
| STUCKER MESA DOMESTIC WC | 36 | 32 |
| RIPVIEW COURT 1 | 35 | 0 |
| RIPVIEW COURT 4 | 35 | 0 |
| RIPVIEW COURT 2 | 31 | 0 |
| RIPVIEW COURT 3 | 31 | 0 |
Cities in Delta (6)
Frequently Asked Questions
What is the environmental risk level in Delta, Colorado? ▼
Are there Superfund sites in Delta? ▼
How many toxic release facilities are in Delta? ▼
What is the air quality in Delta? ▼
Is the drinking water safe in Delta? ▼
What environmental agencies cover Delta? ▼
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.