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City water profile

Alamosa water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Alamosa, Colorado.

Median indexed hardness

109PPM

One indexed ZIP

Range 109–109 PPM

State comparison
50 PPM above
State hardness rank
#31 of 58
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Alamosa has 1 published ZIP profile across Alamosa County. The indexed median is 109 PPM, compared with 59 PPM across Colorado.

Among the 58 Coloradocities with an indexed median, Alamosa ranks #31from highest to lowest. Across all 161 state ZIP profiles, available estimates run from 13.7to 829 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. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

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
39.1 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Oct 25, 2016 to Aug 10, 2021.

ZIP directory

Water reports in Alamosa

Open a ZIP for site-level provenance and measurements.

ZIP code

81101

Moderately Hard

109 PPM

Nearest site
39.1 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Alamosa City Of

PWSID CO0102100

Groundwater
System population served
11,271
Last reported
Jun 17, 2026

A municipal system, in-state city, and served county all agree with this Census 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.

No violation records are included in the current lookback window.

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 Alamosa

Is the water hard?

The indexed city median is 109 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.