Lakeside Water System
EPA ID: MT0000266 · 1,225 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Lakeside Water System (MT0000266): no drinking-water violations recorded since 2021. From the earliest to the most recent cycle in the EPA data on file, Lakeside Water System has logged zero violations for the 1,225 people in its service area - a count of records, not a test result for any home.
Data: EPA SDWIS
Service Area Map
Coverage area for Lakeside Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Lakeside Water System have a median household income of $68,467 and about 4,147 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 42% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 37% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). 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?
Lakeside Water System's water is classified in EPA records as a groundwater source. 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
Comparable Water Systems
Similar-sized systems in Montana
System Overview
Lakeside Water System (EPA ID: MT0000266) is a community water system in Montana that serves approximately 1,225 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.003 mg/L | No | 2025-12-31 |
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
2 of 2 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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 available EPA compliance records for Lakeside Water System (MT0000266) on EPA.gov.
Frequently Asked Questions
Is Lakeside Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Lakeside Water System in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Lakeside Water System serve?
Lakeside Water System serves approximately 1,225 people across 2 ZIP codes in Montana.
Where does Lakeside Water System get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Lakeside Water System Water Quality Report, MT. https://zipcheckup.com/water-system/mt0000266/
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author = {{ZipCheckup}},
title = {{Lakeside Water System Water Quality Report, MT}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/mt0000266/}
}