Adams County, Colorado
28 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Across Adams County's 28 ZIP codes, water safety results are uneven — a portion of systems carry active or recent violations, while others meet standards without issues.
How Adams County Compares
How Adams County Compares
Adams County scores 0 points above the Colorado state average (60/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Adams County, Colorado
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.9 (asthma 11%, diabetes 9.5%)
Estimated additional annual cost per homeowner: $939, driven primarily by flood
Infrastructure: 0.327% avg pipe failure probability, 15% of ZIPs at high risk
44.6% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↑ Worsening trendEPA violation counts by year across Adams County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 9 violations. Past 5 years: 16 total (16 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $939
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
199,528 housing units in Adams County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Adams County
Remediation costs are relatively manageable for most homeowners in Adams County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Adams County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Adams County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Aurora | 533,407 | 76 |
| 2 | East Cherry Creek Valley Water Supply District | 66,130 | 72 |
| 3 | Poudre Valley Mhc | 985 | 72 |
| 4 | Collins Aire Mhc | 946 | 72 |
| 5 | Lago Vista Mobile Home Park | 842 | 72 |
37 total water systems serve Adams County.
All ZIP Codes in Adams County
28 ZIP codes tracked in Adams County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 80022 | Commerce City | 70 | B | 0 | $448K |
| 2 | 80640 | Henderson | 70 | B | 0 | $464K |
| 3 | 80031 | Westminster | 69 | C | 12 (1 health) | $499K |
| 4 | 80233 | Denver | 69 | C | 3 | $441K |
| 5 | 80234 | Denver | 69 | C | 3 | $494K |
| 6 | 80260 | Denver | 69 | C | 3 | $188K |
| 7 | 80601 | Brighton | 69 | C | 1 (1 health) | $472K |
| 8 | 80602 | Brighton | 69 | C | 1 (1 health) | $639K |
| 9 | 80037 | Commerce City | 66 | C | 0 | — |
| 10 | 80241 | Thornton | 66 | C | 8 | $502K |
| 11 | 80614 | Eastlake | 66 | C | 0 | — |
| 12 | 80035 | Westminster | 65 | C | 12 (1 health) | — |
| 13 | 80036 | Westminster | 65 | C | 12 (1 health) | — |
| 14 | 80030 | Westminster | 64 | C | 12 (1 health) | $422K |
| 15 | 80102 | Bennett | 64 | C | 4 | $491K |
| 16 | 80221 | Denver | 64 | C | 3 | $450K |
| 17 | 80229 | Denver | 64 | C | 3 | $383K |
| 18 | 80136 | Strasburg | 63 | C | 27 (4 health) | $496K |
| 19 | 80124 | Lone Tree | 53 | D | 0 | $727K |
| 20 | 80652 | Roggen | 53 | D | 0 | $473K |
| 21 | 80011 | Aurora | 51 | D | 12 | $367K |
| 22 | 80019 | Aurora | 51 | D | 12 | $529K |
| 23 | 80044 | Aurora | 51 | D | 12 | — |
| 24 | 80045 | Aurora | 51 | D | 12 | — |
| 25 | 80046 | Aurora | 51 | D | 12 | — |
| 26 | 80047 | Aurora | 51 | D | 12 | — |
| 27 | 80024 | Dupont | 40 | D | 0 | — |
| 28 | 80131 | Louviers | 40 | D | 0 | $396K |
Recommended Buyer Guides for Adams County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Adams County, Colorado
Overview
Adams County in Colorado covers 28 ZIP codes with an average Home Safety Score of C (60/100).
20 of 28 ZIP codes have recorded EPA violations. 10 health-based violations have been documented.
← Back to Colorado water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.