A
93

Excellent Water Quality

Bozeman, MT 59771

Gallatin County · Population served: 56,432 · Data updated March 2026

Water Systems Serving This Area

🏔
BOZEMAN CITY OF
Surface water · Pop. 56,000
PWSID: MT0000161
🌊
COUNTRY COURT GALLATIN
Groundwater · Pop. 30
PWSID: MT0001644
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BRIDGER PINES COUNTY W AND S DISTRICT
Groundwater · Pop. 58
PWSID: MT0001787
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RIVERSIDE WATER AND SEWER DIST
Groundwater · Pop. 344
PWSID: MT0002173

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
5.0
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

2Total (5yr)
0Health-Based
0Major

Water Quality Summary

Understanding Your Water in Bozeman

Tap water quality in Bozeman, Montana (59771) receives an overall grade of A (Excellent) with a score of 93 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 18 points above the Montana state average of 75. Compared to the national average (75), this area performs significantly better. The area is served by 4 water systems providing water to approximately 56,432 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention.

Your Score 93/100 A
vs State 18 pts above Montana avg (75)
vs National 18 pts above national avg (75)

What a Grade A Means

A score of 93/100 means the water supply in Bozeman, MT meets or exceeds all EPA standards with minimal issues. Contaminant levels are well within safe limits, and the water system has maintained a strong compliance record. While no water supply is guaranteed perfect at the tap due to household plumbing, this is among the best-scoring areas in the country.

Surface water: sourced from rivers, lakes, or reservoirs
Groundwater: drawn from underground aquifers via wells

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Bozeman, Montana receives a grade of A (Excellent) with a score of 93/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 59771 is served by 4 water systems using surface water, groundwater sources, providing water to approximately 56,432 people. Multiple source types mean your water may come from a blend of surface and underground sources.

Lead was detected at 5.0 ppb in Bozeman, Montana. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.

No PFAS ("forever chemicals") were detected in water systems serving Bozeman, Montana during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Bozeman, Montana have received 2 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Bozeman, Montana should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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