City of Aurora
EPA ID: CO0103005 · 533,407 people served · 27 ZIP codes
In the current EPA monitoring period, City of Aurora has 6 violations still listed as unresolved, with the utility supplying water to approximately 533,407 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Aurora Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The City of Aurora serves a community with a median household income of $97,457 and an estimated 734,371 residents across its service area.
🌊 Where Does Your Water Come From?
City of Aurora'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.
About 1% of homes in Arapahoe County, Colorado rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 72th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How City of Aurora compares to EPA limits
What This Means For You
Lead at 1 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
Total Trihalomethanes (TTHM) at 1 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Stage 1 DBP Rule at 5 mg/L exceeds the EPA maximum of mg/L.
Revised Total Coliform Rule at 5 presence exceeds the EPA maximum of presence.
Consumer Confidence Report Rule at 4 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 59 detections recorded. 3 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
City of Aurora (EPA ID: CO0103005) is a community water system in Colorado that serves approximately 533,407 people from surface water sources.
This system provides water to 27 ZIP codes across 5 communities.
Average Home Safety Score: D (54/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Unresolved |
| July 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| July 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| April 1, 2025 | Stage 1 DBP Rule | Monitoring | Resolved |
| April 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| February 20, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 20, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| August 5, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| July 11, 2024 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| July 11, 2024 | Contaminant 0600 | Monitoring | Unresolved |
| July 1, 2024 | Gross Beta | Monitoring | Resolved |
| July 1, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| April 1, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| January 11, 2024 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| January 11, 2024 | Contaminant 0600 | Monitoring | Resolved |
| January 1, 2024 | Total Trihalomethanes (TTHM) | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | E. coli | Monitoring | Resolved |
| October 1, 2023 | Revised Total Coliform Rule | Monitoring | Resolved |
| April 1, 2023 | Revised Total Coliform Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 5 | No |
| Revised Total Coliform Rule | Microbiological | 5 | No |
| Consumer Confidence Report Rule | Reporting Failure | 4 | No |
| Contaminant 0600 | Other Violation | 2 | No |
| Lead | Inorganic | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 1 | No |
| Gross Beta | Radionuclides | 1 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
| E. coli | Microbiological | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 80137 | 0.004 mg/L | No | N/A |
| 80010 | 0.0025 mg/L | No | N/A |
| 80011 | 0.0025 mg/L | No | N/A |
| 80012 | 0.0025 mg/L | No | N/A |
| 80013 | 0.0025 mg/L | No | N/A |
| 80014 | 0.0025 mg/L | No | N/A |
| 80015 | 0.0025 mg/L | No | N/A |
| 80016 | 0.0025 mg/L | No | N/A |
| 80017 | 0.0025 mg/L | No | N/A |
| 80018 | 0.0025 mg/L | No | N/A |
| 80019 | 0.0025 mg/L | No | N/A |
| 80040 | 0.0025 mg/L | No | N/A |
| 80041 | 0.0025 mg/L | No | N/A |
| 80042 | 0.0025 mg/L | No | N/A |
| 80044 | 0.0025 mg/L | No | N/A |
| 80045 | 0.0025 mg/L | No | N/A |
| 80046 | 0.0025 mg/L | No | N/A |
| 80047 | 0.0025 mg/L | No | N/A |
| 80102 | 0.001 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 21 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 6 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 80010 — Aurora
- 80011 — Aurora
- 80012 — Aurora
- 80013 — Aurora
- 80014 — Aurora
- 80015 — Aurora
- 80016 — Aurora
- 80017 — Aurora
- 80018 — Aurora
- 80019 — Aurora
- 80040 — Aurora
- 80041 — Aurora
- 80042 — Aurora
- 80044 — Aurora
- 80045 — Aurora
- 80046 — Aurora
- 80047 — Aurora
- 80102 — Bennett
- 80137 — Watkins
- 80138 — Parker
- 80220 — Denver
- 80230 — Denver
- 80231 — Denver
- 80238 — Denver
- 80239 — Denver
- 80247 — Denver
- 80249 — Denver
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Aurora (CO0103005) on EPA.gov.
Frequently Asked Questions
Is City of Aurora water safe to drink?
City of Aurora has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does City of Aurora serve?
City of Aurora serves approximately 533,407 people across 27 ZIP codes in Colorado.
Where does City of Aurora get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
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.
Frequently Asked Questions
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
City of Aurora (EPA ID: CO0103005) — request the latest Consumer Confidence Report or ask about specific contaminants.