City of Marsing
EPA ID: ID3370013 · 1,300 people served · 2 ZIP codes
Looking at the EPA enforcement file for City of Marsing, 9 violations are listed as unresolved — those findings cover the utility's service area of approximately 1,300 people and remain open in the federal compliance system, awaiting formal corrective action documentation.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2021) to 1 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for City of Marsing Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Marsing serves a community with a median household income of $60,539 and an estimated 8,146 residents across its service area. Approximately 51% 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 Marsing'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 1% of homes in Owyhee County, Idaho 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 Marsing compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 7 mg/L exceeds the EPA maximum of mg/L.
Total Coliform at 4 presence exceeds the EPA maximum of presence.
Revised Total Coliform Rule at 3 presence exceeds the EPA maximum of presence.
Contaminant 0700 at 2 mg/L exceeds the EPA maximum of mg/L.
Barium at 3 mg/L exceeds the EPA maximum of 2 mg/L.
Comparable Water Systems
Similar-sized systems in Idaho
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 Marsing (EPA ID: ID3370013) is a community water system in Idaho that serves approximately 1,300 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: B (79/100)
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 | Total Coliform | Monitoring | Unresolved |
| August 1, 2025 | Total Coliform | Monitoring | Unresolved |
| May 18, 2025 | Contaminant 0700 | Health-based | Resolved |
| February 17, 2025 | Contaminant 0700 | Monitoring | Resolved |
| December 17, 2024 | Total Coliform | Monitoring | Resolved |
| November 26, 2024 | Lead and Copper Rule | Monitoring | Unresolved |
| September 16, 2024 | Consumer Confidence Report Rule | Health-based | Resolved |
| August 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| December 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 1, 2023 | Barium | Monitoring | Unresolved |
| July 1, 2023 | Revised Total Coliform Rule | Monitoring | Unresolved |
| June 1, 2023 | Consumer Confidence Report Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 7 | Yes |
| Total Coliform | Microbiological | 4 | No |
| Barium | Inorganic | 3 | No |
| Revised Total Coliform Rule | Microbiological | 3 | No |
| Contaminant 0700 | Other Violation | 2 | Yes |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Lead and Copper 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 |
|---|---|---|---|
| 83639 | 0.003 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
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 ID 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 City of Marsing (ID3370013) on EPA.gov.
Frequently Asked Questions
Is City of Marsing water safe to drink?
City of Marsing has recorded 3 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 Marsing serve?
City of Marsing serves approximately 1,300 people across 2 ZIP codes in Idaho.
Where does City of Marsing 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 Marsing (EPA ID: ID3370013) — request the latest Consumer Confidence Report or ask about specific contaminants.