D38/100
Malmstrom Air Force Base Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 8,850 residents · Montana
What's In Malmstrom Air Force Base's Tap Water?
32
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.21 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: November 1, 2024 – November 30, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2024 – June 30, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2024 – June 30, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – July 26, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2021 – January 5, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
MALMSTROM AIR FORCE BASE
Population Served
8,850
Water Source
Purchased Surface Water
System ID
MT0000515
Frequently Asked Questions About Malmstrom Air Force Base Water
Is Malmstrom Air Force Base tap water safe to drink?
Malmstrom Air Force Base, Montana tap water receives a grade of D (38/100), which is considered poor. 1 contaminant(s) exceed EPA maximum contaminant levels and 26 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Malmstrom Air Force Base's water?
Of the 32 contaminants tested in Malmstrom Air Force Base's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Malmstrom Air Force Base have any water quality violations?
Yes, Malmstrom Air Force Base has 26 EPA violation(s) on record, with the most recent in 2024. Violation types include MON, MR, Other. 7 of these are health-based violations, which are the most serious category.
Do I need a water filter in Malmstrom Air Force Base?
Based on EPA data, using a water filter in Malmstrom Air Force Base is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Malmstrom Air Force Base's tap water come from?
Malmstrom Air Force Base's drinking water is sourced from purchased surface water and supplied by MALMSTROM AIR FORCE BASE. The system serves approximately 8,850 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Malmstrom Air Force Base's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Malmstrom Air Force Base's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Malmstrom Air Force Base's water compare to other cities in Montana?
Malmstrom Air Force Base's water quality score of 38/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Montana state page to see how all cities in the state compare.
What should I do if I'm concerned about Malmstrom Air Force Base's water quality?
If you have concerns about Malmstrom Air Force Base's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (MALMSTROM AIR FORCE BASE) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.