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City water profile

Lolo water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Lolo, Montana.

Median indexed hardness

80PPM

One indexed ZIP

Range 79.9–79.9 PPM

State comparison
42 PPM below
State hardness rank
#81 of 117
Matched utilities
6
Active health records
0

City summary

What the indexed records say

Lolo has 1 published ZIP profile across Missoula County. The indexed median is 80 PPM, compared with 122 PPM across Montana.

Among the 117 Montanacities with an indexed median, Lolo ranks #81from highest to lowest. Across all 145 state ZIP profiles, available estimates run from 0.2to 799.5 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard1 ZIP
Hard0 ZIPs
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
12.6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Mar 4, 2016 to Apr 16, 2026.

ZIP directory

Water reports in Lolo

Open a ZIP for site-level provenance and measurements.

ZIP code

59847

Moderately Hard

79.9 PPM

Nearest site
12.6 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Lolo Water And Sewer Dist

PWSID MT0000278

Groundwater
System population served
3,315
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Shelby Addition Water District

PWSID MT0002800

Groundwater
System population served
145
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Bitterroot Gateway Mb Pk Lolo

PWSID MT0000443

Groundwater
System population served
130
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Valley West Trailer Court

PWSID MT0000444

Groundwater
System population served
115
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Branco Court

PWSID MT0004568

Groundwater
System population served
37
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Valley Grove Water Users Association

PWSID MT0000490

Groundwater
System population served
30
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Lead and Copper RuleMT0000443Oct 1, 2024Resolved
Nitrate-NitriteMT0000278Jan 1, 2024Resolved
CadmiumMT0000443Jan 1, 2023Resolved
ChromiumMT0000443Jan 1, 2023Resolved
MercuryMT0000443Jan 1, 2023Resolved
NickelMT0000443Jan 1, 2023Resolved
Antimony, TotalMT0000443Jan 1, 2023Resolved
BariumMT0000443Jan 1, 2023Resolved
CadmiumMT0000443Jan 1, 2023Resolved
FluorideMT0000443Jan 1, 2023Resolved

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Lolo

Is the water hard?

The indexed city median is 80 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.