City of Maupin
EPA ID: OR4100510 · 420 people served · 1 ZIP code
Federal compliance records for City of Maupin list 7 open violations that have not yet been resolved — the utility serves approximately 420 people, and each outstanding finding remains logged and active in the EPA enforcement database.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Maupin Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Maupin serves a community with a median household income of $62,422 and an estimated 857 residents across its service area. Approximately 66% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 38% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
City of Maupin's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 2% of homes in Wasco County, Oregon 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 80th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How City of Maupin 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.
Surface Water Treatment Rule at 7 mg/L exceeds the EPA maximum of mg/L.
Contaminant 0700 at 6 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 4 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
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 Maupin, (EPA ID: OR4100510) is a community water system in Oregon that serves approximately 420 people from groundwater sources.
This system serves ZIP code 97037 in Maupin.
Average Home Safety Score: B (77/100)
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 | Resolved |
| July 1, 2025 | Contaminant 0700 | Monitoring | Unresolved |
| June 1, 2025 | Contaminant 0700 | Monitoring | Unresolved |
| April 10, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| December 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unresolved |
| October 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| August 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| August 1, 2023 | Contaminant 0700 | Monitoring | Unresolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| May 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| May 1, 2023 | Contaminant 0700 | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Failure | 7 | No |
| Contaminant 0700 | Other Violation | 6 | No |
| Consumer Confidence Report Rule | Reporting Failure | 4 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Lead and Copper Rule | Treatment Failure | 2 | No |
| Lead | Inorganic | 1 | No |
| Stage 1 DBP Rule | Treatment Failure | 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 |
|---|---|---|---|
| 97037 | 0.001 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate 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
- 97037 — Maupin
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Maupin (OR4100510) on EPA.gov.
Frequently Asked Questions
Is City of Maupin water safe to drink?
City of Maupin has recorded 2 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does City of Maupin serve?
City of Maupin serves approximately 420 people across 1 ZIP code in Oregon.
Where does City of Maupin get its water?
The primary water source is groundwater.
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 Maupin (EPA ID: OR4100510) — request the latest Consumer Confidence Report or ask about specific contaminants.