Bar Nunn, Town of
EPA ID: WY5600067 · 4,000 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Bar Nunn, Town of (WY5600067): no EPA violations recorded in the last five years. In every reporting cycle over the past five years, Bar Nunn, Town of has come through without a single EPA violation - a consistent performance across the full service population of approximately 4,000 residents that reflects both well-maintained infrastructure and reliable operational oversight.
Data: EPA SDWIS
Service Area Map
Coverage area for Bar Nunn, Town of Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Bar Nunn, Town of serves a community with a median household income of $72,105 and an estimated 54,529 residents across its service area. Approximately 67% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Bar Nunn, Town of'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.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Wyoming
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
Bar Nunn, Town of (EPA ID: WY5600067) is a community water system in Wyoming that serves approximately 4,000 people from surface water sources.
This system provides water to 2 ZIP codes across 1 community.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.001 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: 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 WY or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Bar Nunn, Town of (WY5600067) on EPA.gov.
Frequently Asked Questions
Is Bar Nunn, Town of water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Bar Nunn, Town of in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Bar Nunn, Town of serve?
Bar Nunn, Town of serves approximately 4,000 people across 2 ZIP codes in Wyoming.
Where does Bar Nunn, Town of get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
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 →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Bar Nunn, Town of Water Quality Report, WY. https://zipcheckup.com/water-system/wy5600067/
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