City of Rupert
EPA ID: ID5340017 · 5,796 people served · 1 ZIP code
In the most recent EPA reporting cycle, City of Rupert carried 5 violations still marked as unresolved — each remains active in the federal enforcement ledger while the utility continues operations for its service population of approximately 5,796 people across the area it supplies.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Rupert Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The City of Rupert serves a community with a median household income of $61,622 and an estimated 12,905 residents across its service area. Approximately 75% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 40% 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 Rupert'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 Minidoka 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 Rupert compares to EPA limits
What This Means For You
Revised Total Coliform Rule at 2 presence exceeds the EPA maximum of presence.
Total Coliform at 1 presence exceeds the EPA maximum of presence.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of 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 Rupert (EPA ID: ID5340017) is a community water system in Idaho that serves approximately 5,796 people from groundwater sources.
This system serves ZIP code 83350 in Rupert.
Average Home Safety Score: B (73/100)
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 |
|---|---|---|---|
| January 28, 2024 | Total Coliform | Monitoring | Unresolved |
| January 1, 2024 | Revised Total Coliform Rule | Monitoring | Unresolved |
| December 30, 2023 | Stage 1 DBP Rule | Monitoring | Unresolved |
| June 1, 2023 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| April 1, 2023 | Revised Total Coliform Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 2 | No |
| Total Coliform | Microbiological | 1 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Consumer Confidence Report Rule | Reporting 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 |
|---|---|---|---|
| 83350 | 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.
- 83350 — Rupert
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Rupert (ID5340017) on EPA.gov.
Frequently Asked Questions
Is City of Rupert water safe to drink?
City of Rupert has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does City of Rupert serve?
City of Rupert serves approximately 5,796 people across 1 ZIP code in Idaho.
Where does City of Rupert 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 →
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.
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
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 Rupert (EPA ID: ID5340017) — request the latest Consumer Confidence Report or ask about specific contaminants.