Contaminant 0300
Unresolved Long Term 1 Enhanced SWTR violation cited in 2023 (contaminant 0300).
City · TRI 2024
Paonia, Colorado Pollution
0 TRI facilities inside the city limits and 10 public water systems serving residents.
FIPS 0857300 · population 1,571 · Delta County
Anomaly engine
Notable Signals
Contaminant 0300
Unresolved Long Term 1 Enhanced SWTR violation cited in 2023 (contaminant 0300).
Contaminant 8000
Unresolved Revised Total Coliform Rule violation cited in 2023 (contaminant 8000).
Chlorine
Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2023 (chlorine).
Showing the 4 most editorially weighted signals out of 11. Lower-severity signals fold into the chemical breakdown and history charts below.
Pollutant pathways
Paonia Pollutant Multi-Year Trends
PM2.5 annual mean (NAAQS 9 µg/m³ (annual))Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.
PM2.5 annual mean (NAAQS 9 µg/m³ (annual)) concentrations have fallen 41% since 2010.
PM2.5 24-hour 98th percentile (NAAQS 35 µg/m³ (24-hour))Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.
PM2.5 24-hour 98th percentile (NAAQS 35 µg/m³ (24-hour)) concentrations have fallen 34% since 2010.
Ozone 8-hour 4th-highest daily max (NAAQS 0.070 ppm (8-hour))Health riskGround-level ozone (smog) forms when vehicle and industrial emissions react in sunlight. Inflames the airways, triggers asthma attacks, and worsens heart and lung disease.
Ozone 8-hour 4th-highest daily max (NAAQS 0.070 ppm (8-hour)) concentrations are up 11% since 2018.
NO₂ annual mean (NAAQS 53 ppb (annual))Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.
NO₂ annual mean (NAAQS 53 ppb (annual)) concentrations have fallen 30% since 2018.
Lifetime cancer risk all pollutants (100 in a million (EPA elevated threshold))Health riskEPA-modeled added cancer cases per million residents from a lifetime of breathing local air toxics. EPA flags 100-in-a-million as elevated.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
Formaldehyde ambient mean (0.077 µg/m³ (1-in-a-million URE))Health riskAn air toxic emitted by refineries, wood products, and combustion. EPA classifies it as a known human carcinogen — long-term inhalation raises cancer risk.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
Benzene ambient mean (0.13 µg/m³ (1-in-a-million URE))Health riskAn air toxic from gasoline, refineries, and tobacco smoke. A known human carcinogen — chronic exposure is linked to leukemia and other blood cancers.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
TRI air releases (5.1 fugitive + 5.2 stack)Health riskToxic chemicals reported by industrial facilities as released into the air — fugitive leaks plus smokestack emissions. Higher pounds means more inhaled exposure for nearby residents.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
TRI water releases (5.3)Health riskToxic chemicals reported by industrial facilities as discharged to surface waters (rivers, lakes, the ocean). Affects fishing, recreation, and downstream drinking-water intakes.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
TRI land + off-site releasesHealth riskToxic chemicals released to land on-site or transferred off-site for disposal — landfills, deep-well injection, and similar. Risks groundwater contamination over time.
Single-vintage exposure modeling — EPA cadence is multi-year, so no trend line yet.
Greenhouse gases (GHGRP large emitters, through 2016)Health riskGreenhouse gases reported by large industrial emitters under EPA's GHGRP, in metric tons of CO₂ equivalent. Drives climate warming and the heat-related health effects that follow.
Greenhouse gases (GHGRP large emitters, through 2016) concentrations are up 19% since 2011.
Drinking water · SDWIS
Water Systems Serving Paonia
9 unresolved violations on the SDWIS record across utilities serving this city.
10
Utilities serving
3,847
Population served
34
Health-based · 5yr
9
Unresolved
| Water system | PWSID | Population served | Health-based · 5yr | Status |
|---|---|---|---|---|
| Bone Mesa Domestic Wd Municipal | CO0115152 | 400 | 19 | UNRESOLVED |
| Paonia Town Of Municipal | CO0115601 | 2,499 | 7 | UNRESOLVED |
| Hidden Valley Hoa Water Company Private | CO0115342 | 120 | 2 | UNRESOLVED |
| Pitkin Mesa Pipeline Co Private | CO0115610 | 295 | 6 | Returned to compliance |
| Minnesota Pipeline Municipal | CO0115513 | 72 | 0 | UNRESOLVED |
| Hammond Pipeline Private | CO0115340 | 70 | 0 | UNRESOLVED |
Showing the 6 systems with recorded health-based or unresolved violations. 4 additional systems are in compliance with no recorded health-based violations in the past 5 years and are not individually tabulated.
A public water systemis the regulated entity, not the city. EPA's SDWIS definition covers anything serving 25+ people for 60+ days a year or with 15+ service connections — that includes municipal utilities (City of Stockton), water districts, mobile home parks operating their own wells, schools, and small private subdivisions. Each system is independently monitored. Some systems serve multiple cities; some cities are served by many systems.
Equity context · ACS 2018-2022 · USEPA-clone EJ disparity
Who Lives In Paonia
Paonia, Colorado (Census place block groups): 1,571 residents. Why we surface this →
15.4%
Low-income
19.2%
People of color
4.6%
Under age 5
26.2%
Over age 64
Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).
Health context
Co-Located Health Indicators
Modeled adult-prevalence estimates published by CDC PLACES, paired with this city's pollution and demographic context. Comparisons are ecological, not causal — pollution and disease prevalence covary at the area level, but the data does not attribute any individual's diagnosis to local exposure. How this section works →
Adult asthma (current)
11.8%
CDC PLACES · 2025 release · BRFSS 2022-2023
COPD prevalence
8.9%
CDC PLACES · 2025 release · BRFSS 2022-2023
Coronary heart disease
8.3%
CDC PLACES · 2025 release · BRFSS 2022-2023
Diabetes (diagnosed)
11.7%
CDC PLACES · 2025 release · BRFSS 2022-2023
Frequent mental distress
16.0%
CDC PLACES · 2025 release · BRFSS 2022-2023
PLACES uses BRFSS-modeled small-area estimates, not individual records. Crude prevalence shown above is the local rate as published; comparators are age-adjusted vs the Colorado mean and the US mean — both population-weighted across counties — so geographies with different age structures stay apples-to-apples. Sources: CDC PLACES · 2025 release · BRFSS 2022-2023.
Sources.
- EPA Toxics Release Inventory · retrieved 2026-05-07.
- EPA Safe Drinking Water Information System · retrieved 2026-05-07.