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City water profile

Lafayette water quality

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

Median indexed hardness

42PPM

One indexed ZIP

Range 42–42 PPM

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

City summary

What the indexed records say

Lafayette has 1 published ZIP profile across Boulder County. The indexed median is 42 PPM, compared with 59 PPM across Colorado.

Among the 58 Coloradocities with an indexed median, Lafayette ranks #50from 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.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard0 ZIPs
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
19.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 5, 2016 to Jun 2, 2026.

ZIP directory

Water reports in Lafayette

Open a ZIP for site-level provenance and measurements.

ZIP code

80026

Soft

42 PPM

Nearest site
19.4 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Lafayette City Of

PWSID CO0107473

Surface water
System population served
28,700
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.

RecordSystemPeriodStatus
Surface Water Treatment RuleCO0107473Dec 1, 2025Resolved
Interim Enhanced Surface Water Treatment RuleCO0107473Dec 1, 2025Resolved
Revised Total Coliform RuleCO0107473Jul 1, 2025Resolved
ChlorineCO0107473Jul 1, 2025Resolved
Surface Water Treatment RuleCO0107473Jul 1, 2025Resolved
Consumer Confidence RuleCO0107473Jul 1, 2021Resolved

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 Lafayette

Is the water hard?

The indexed city median is 42 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.