Denver Water Board
EPA ID: CO0116001 · 1,287,000 people served · 40 ZIP codes
ZipCheckup's reading of EPA records for Denver Water Board (CO0116001): 34 violations on record since 2021. While 34 violations did appear in Denver Water Board's monitoring record, none is listed as unresolved; the utility serves approximately 1,287,000 residents. A closed violation record does not by itself establish compliance with every current EPA standard.
Data: EPA SDWIS
Service Area Map
Coverage area for Denver Water Board Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: C
Demographics of ZIP Codes Served
The ZIP codes associated with Denver Water Board have a median household income of $86,723 and about 1,018,389 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 61% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Denver Water Board's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Wastewater Proximity Note: This service area ranks in the 62th percentile nationally for proximity to wastewater discharge points. Surface water sources near wastewater outfalls may face additional treatment challenges.
Superfund Proximity Note: This service area ranks in the 77th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 25 detections recorded. 2 detections are above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
Comparable Water Systems
Similar-sized systems in Colorado
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Denver Water Board (EPA ID: CO0116001) is a community water system in Colorado that serves approximately 1,287,000 people from surface water sources.
This system provides water to 40 ZIP codes across 4 communities.
ZIP-Area Home Safety Context: C (65/100)
This is the average Home Safety Score for 30 of 40 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 3 resolved, 31 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| March 1, 2024 | Interim Enhanced Surface Water Treatment Rule | Non-health-based | Resolved |
| January 1, 2024 | Combined Uranium | Non-health-based | Resolved |
| January 1, 2023 | Endrin | Non-health-based | Archived |
| January 1, 2023 | BHC-GAMMA | Non-health-based | Archived |
| January 1, 2023 | Methoxychlor | Non-health-based | Archived |
| January 1, 2023 | Toxaphene | Non-health-based | Archived |
| January 1, 2023 | Dalapon | Non-health-based | Archived |
| January 1, 2023 | Diquat | Non-health-based | Archived |
| January 1, 2023 | Endothall | Non-health-based | Archived |
| January 1, 2023 | Di(2-ethylhexyl) adipate | Non-health-based | Archived |
| January 1, 2023 | OXAMYL | Non-health-based | Archived |
| January 1, 2023 | Simazine | Non-health-based | Archived |
| January 1, 2023 | Di(2-ethylhexyl) phthalate | Non-health-based | Archived |
| January 1, 2023 | Picloram | Non-health-based | Archived |
| January 1, 2023 | Dinoseb | Non-health-based | Archived |
| January 1, 2023 | Hexachlorocyclopentadiene | Non-health-based | Archived |
| January 1, 2023 | Aldicarb sulfoxide | Non-health-based | Archived |
| January 1, 2023 | Aldicarb sulfone | Non-health-based | Archived |
| January 1, 2023 | Carbofuran | Non-health-based | Archived |
| January 1, 2023 | Aldicarb | Non-health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Monitoring & Reporting | 2 | No |
| Endrin | Other Violation | 1 | No |
| BHC-GAMMA | Other Violation | 1 | No |
| Methoxychlor | Other Violation | 1 | No |
| Toxaphene | Other Violation | 1 | No |
| Dalapon | Other Violation | 1 | No |
| Diquat | Other Violation | 1 | No |
| Endothall | Other Violation | 1 | No |
| Di(2-ethylhexyl) adipate | Other Violation | 1 | No |
| OXAMYL | Other Violation | 1 | No |
| Simazine | Other Violation | 1 | No |
| Di(2-ethylhexyl) phthalate | Monitoring & Reporting | 1 | No |
| Picloram | Other Violation | 1 | No |
| Dinoseb | Other Violation | 1 | No |
| Hexachlorocyclopentadiene | Other Violation | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0031 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
40 of 40 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CO or modeled from parcel and building-footprint data.
This system serves 40 ZIP codes:
80012 · 80014 · 80019 · 80110 · 80123 80202 · 80203 · 80204 · 80205 · 80206 80207 · 80209 · 80210 · 80211 · 80212 80214 · 80216 · 80218 · 80219 · 80220 80221 · 80222 · 80223 · 80224 · 80227 80230 · 80231 · 80232 · 80235 · 80236 80237 · 80238 · 80239 · 80246 · 80247 80249 · 80264 · 80266 · 80290 · 80294
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Denver Water Board (CO0116001) on EPA.gov.
Frequently Asked Questions
Is Denver Water Board water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Denver Water Board; its 34 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Denver Water Board serve?
Denver Water Board serves approximately 1,287,000 people across 40 ZIP codes in Colorado.
Where does Denver Water Board get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
- #67 / 100 Highest Exposure Burden (U.S.)
- #1 / 50 Highest Exposure Burden (Colorado)
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Denver Water Board (CO): 34 EPA Violations. https://zipcheckup.com/water-system/co0116001/
@misc{zipcheckup-water-system-co0116001,
author = {{ZipCheckup}},
title = {{Denver Water Board (CO): 34 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/co0116001/}
}
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Denver Water Board (EPA ID: CO0116001) - request the latest Consumer Confidence Report or ask about specific contaminants.