City of Lostine
EPA ID: OR4100491 · 350 people served · 1 ZIP code
With 6 unresolved EPA violations, City of Lostine is currently out of full compliance — approximately 350 people in its service area.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Lostine Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Lostine serves a community with a median household income of $62,321 and an estimated 597 residents across its service area. Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 67% 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 Lostine'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 0% of homes in Wallowa County, Oregon rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How City of Lostine compares to EPA limits
What This Means For You
Lead at 2 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.
Contaminant 0700 at 10 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
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System Overview
City of Lostine, (EPA ID: OR4100491) is a community water system in Oregon that serves approximately 350 people from groundwater sources.
This system serves ZIP code 97857 in Lostine.
Average Home Safety Score: B (84/100)
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 |
|---|---|---|---|
| September 1, 2025 | Contaminant 0700 | Monitoring | Unresolved |
| August 1, 2025 | Contaminant 0700 | Monitoring | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Unresolved |
| May 1, 2025 | Contaminant 0700 | Monitoring | Resolved |
| January 1, 2025 | Contaminant 0700 | Monitoring | Resolved |
| January 1, 2025 | Lead | Monitoring | Resolved |
| December 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| October 1, 2024 | Lead | Monitoring | Resolved |
| June 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| January 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| November 1, 2023 | Contaminant 0700 | Monitoring | Unresolved |
| September 1, 2023 | Contaminant 0700 | Monitoring | Unresolved |
| January 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 |
|---|---|---|---|
| Contaminant 0700 | Other Violation | 10 | No |
| Lead | Inorganic | 2 | No |
| Surface Water Treatment 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 |
|---|---|---|---|
| 97857 | 0.003 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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
- 97857 — Lostine
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Lostine (OR4100491) on EPA.gov.
Frequently Asked Questions
Is City of Lostine water safe to drink?
City of Lostine has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does City of Lostine serve?
City of Lostine serves approximately 350 people across 1 ZIP code in Oregon.
Where does City of Lostine get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
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.
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 Lostine (EPA ID: OR4100491) — request the latest Consumer Confidence Report or ask about specific contaminants.