Seeley Lake, MT 59868

2 water systems • 1,620 residents

Poor water quality - filtration recommended

D

Score: 27/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

34

Contaminants Detected

256

Violations on Record

42

Health-Based Violations

0

Recent Violations

Grade Breakdown

Contaminant Count0 / 25
Violation History9 / 25
Contaminant Severity0 / 25
System Compliance0 / 15
Enforcement History0 / 10
Total Score27%

27 / 100 points

Recommended Water Filters

  • ✓Reverse Osmosis or Ion Exchange Filter
  • ✓Ultraviolet (UV) Purification
  • ✓Activated Carbon Filter (disinfection byproducts)
  • ✓Whole Home Carbon Filter System
Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Seeley Lake vs MT & National Average

Detected Contaminants

34 contaminants detected across water systems serving this ZIP code

ContaminantCategory
Total Haloacetic Acids (HAA5)Disinfection Byproduct
TTHMDisinfection Byproduct
ArsenicHeavy Metal
AsbestosInorganic
Coliform (TCR)Microorganism
1,1,1-TrichloroethaneOther
1,1,2-TrichloroethaneOther
1,2-DichloropropaneOther
2,4-DOther
2,4,5-TPOther
Consumer Confidence RuleOther
DalaponOther
DICHLOROMETHANEOther
DinosebOther
Interim Enhanced Surface Water Treatment RuleOther
PentachlorophenolOther
PicloramOther
1,1-DichloroethyleneVolatile Organic
1,2-DichloroethaneVolatile Organic
1,2,4-TrichlorobenzeneVolatile Organic
BenzeneVolatile Organic
Carbon tetrachlorideVolatile Organic
CHLOROBENZENEVolatile Organic
cis-1,2-DichloroethyleneVolatile Organic
EthylbenzeneVolatile Organic
o-DichlorobenzeneVolatile Organic
p-DichlorobenzeneVolatile Organic
StyreneVolatile Organic
TetrachloroethyleneVolatile Organic
TolueneVolatile Organic
trans-1,2-DichloroethyleneVolatile Organic
TrichloroethyleneVolatile Organic
Vinyl chlorideVolatile Organic
Xylenes, TotalVolatile Organic

Water System Information

Systems Serving This ZIP:
SEELEY LAKE WATER DISTRICT, COUGAR MEADOWS
Population Served:
1,620
Systems With Violations:
2 of 2
Major Violations:
190
Enforcement Actions:
256

Nearby Areas

59865

Saint Ignatius • 24.6 mi away

F

59806

Missoula • 26.8 mi away

D

59802

Missoula • 28.8 mi away

F

59824

Charlo • 29.4 mi away

D

59823

Bonner • 30.9 mi away

C

59864

Ronan • 32.7 mi away

D

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.