Round Butte Water Company
EPA ID: MT0000320 · 400 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Round Butte Water Company (MT0000320): 3 EPA violations in the last five years. Even though Round Butte Water Company accumulated 3 violations over five years, all have been formally resolved - the provider currently meets EPA standards for 400 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Round Butte Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Round Butte Water Company serves a community with a median household income of $61,403 and an estimated 8,852 residents across its service area. Approximately 58% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 48% 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?
Round Butte Water Company'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 Round Butte Water Company compares to EPA limits
What This Means For You
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 Montana
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
Round Butte Water Company (EPA ID: MT0000320) is a community water system in Montana that serves approximately 400 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: 3 resolved, 0 archived, 0 addressed, and 0 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 |
|---|---|---|---|
| December 30, 2021 | Stage 1 DBP Rule | Non-health-based | Resolved |
| May 1, 2021 | Consumer Confidence Report Rule | Non-health-based | Resolved |
| April 27, 2021 | Total Coliform | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| 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 evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.002 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 MT 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 Round Butte Water Company (MT0000320) on EPA.gov.
Frequently Asked Questions
Is Round Butte Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Round Butte Water Company; its 3 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Round Butte Water Company serve?
Round Butte Water Company serves approximately 400 people across 2 ZIP codes in Montana.
Where does Round Butte Water Company get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Round Butte Water Company (MT): 3 EPA Violations. https://zipcheckup.com/water-system/mt0000320/
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title = {{Round Butte Water Company (MT): 3 EPA Violations}},
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url = {https://zipcheckup.com/water-system/mt0000320/}
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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
Round Butte Water Company (EPA ID: MT0000320) - request the latest Consumer Confidence Report or ask about specific contaminants.