City of Mountain Home
EPA ID: ID4200032 · 14,651 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for City of Mountain Home (ID4200032): 2 unresolved EPA violations on record. With 2 unresolved EPA violations, City of Mountain Home is currently out of full compliance - approximately 14,651 people in its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for City of Mountain Home Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The City of Mountain Home serves a community with a median household income of $56,940 and an estimated 24,217 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.
Environmental Justice Note: 100% 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 Mountain Home'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.
Infrastructure Risk
Detected Contaminants
How City of Mountain Home compares to EPA limits
What This Means For You
PFOA at 1 mg/L exceeds the EPA maximum of 0.000004 mg/L.
PFNA at 1 mg/L exceeds the EPA maximum of 0.00001 mg/L.
Contaminant 2015 at 4 mg/L exceeds the EPA maximum of 0.0005 mg/L. Probable carcinogen; liver & thyroid damage, immune suppression. Consider granular activated carbon (GAC) filtration.
Atrazine at 4 mg/L exceeds the EPA maximum of 0.003 mg/L. Endocrine disruption, cardiovascular & reproductive effects. Consider granular activated carbon (GAC) filtration.
Benzene at 4 mg/L exceeds the EPA maximum of 0.005 mg/L.
Contaminant 2015 was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →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 Mountain Home, (EPA ID: ID4200032) is a community water system in Idaho that serves approximately 14,651 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 31 resolved, 116 archived, 0 addressed, and 2 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| August 1, 2025 | Consumer Confidence Report Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Non-health-based | Resolved |
| September 30, 2024 | Total Coliform | Non-health-based | Unaddressed (current) |
| July 22, 2024 | Total Coliform | Non-health-based | Unaddressed (current) |
| January 1, 2023 | Contaminant 2005 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2010 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2015 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2020 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2031 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2032 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2033 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2034 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2035 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2036 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2037 | Non-health-based | Archived |
| January 1, 2023 | Atrazine | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2040 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2041 | Non-health-based | Archived |
| January 1, 2023 | Contaminant 2042 | Non-health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Contaminant 2032 | Other Violation | 5 | No |
| Contaminant 2033 | Other Violation | 5 | No |
| Contaminant 2005 | Other Violation | 4 | No |
| Contaminant 2010 | Other Violation | 4 | No |
| Contaminant 2015 | Other Violation | 4 | No |
| Contaminant 2020 | Other Violation | 4 | No |
| Contaminant 2031 | Other Violation | 4 | No |
| Contaminant 2034 | Other Violation | 4 | No |
| Contaminant 2035 | Other Violation | 4 | No |
| Contaminant 2036 | Other Violation | 4 | No |
| Contaminant 2037 | Other Violation | 4 | No |
| Atrazine | Organic | 4 | No |
| Contaminant 2040 | Other Violation | 4 | No |
| Contaminant 2041 | Other Violation | 4 | No |
| Contaminant 2042 | Other Violation | 4 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 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.
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: 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 Mountain Home (ID4200032) on EPA.gov.
Frequently Asked Questions
Is City of Mountain Home water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 2 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does City of Mountain Home serve?
City of Mountain Home serves approximately 14,651 people across 2 ZIP codes in Idaho.
Where does City of Mountain Home get its water?
The primary water source is groundwater.
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 →
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
How to cite this page
ZipCheckup. (n.d.). City of Mountain Home (ID): 2 Health Violations. https://zipcheckup.com/water-system/id4200032/
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title = {{City of Mountain Home (ID): 2 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/id4200032/}
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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 Mountain Home (EPA ID: ID4200032) - request the latest Consumer Confidence Report or ask about specific contaminants.