City water profile
Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Farmington, New Mexico.
Median indexed hardness
137PPM
2 indexed ZIPs
Range 135–138.5 PPM
City summary
Farmington has 2 published ZIP profiles across San Juan County. The indexed median is 137 PPM, compared with 228 PPM across New Mexico.
Among the 160 New Mexicocities with an indexed median, Farmington ranks #143from highest to lowest. Across all 195 state ZIP profiles, available estimates run from 74.2to 688.5 PPM.
The 135–138.5 PPM range shows how much the available ZIP estimates vary within the city label.
Hardness distribution
2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.
Evidence quality
Confidence labels
Observation window: Feb 16, 2016 to Mar 30, 2026.
ZIP directory
Open a ZIP for site-level provenance and measurements.
Public water systems
PWSID NM3510224
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NM3510524
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NM3510024
The system names this served city; Census place overlap links the city to this ZCTA.
PWSID NM3500224
The system names this served city; Census place overlap links the city to this ZCTA.
Compliance history
1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.
| Record | System | Period | Status |
|---|---|---|---|
| Lead and Copper Rule | NM3510024 | Oct 1, 2025 | Unaddressed |
| Groundwater Rule | NM3510224 | Sep 25, 2025 | Resolved · health-based |
| Chlorine | NM3500224 | Jun 1, 2025 | Resolved |
| Interim Enhanced Surface Water Treatment Rule | NM3510224 | Apr 1, 2025 | Resolved |
| LEAD AND COPPER RULE REVISIONS | NM3510024 | Oct 17, 2024 | Resolved · health-based |
| LEAD AND COPPER RULE REVISIONS | NM3510024 | Oct 17, 2024 | Resolved |
| Consumer Confidence Rule | NM3510024 | Oct 1, 2024 | Resolved |
| Public Notice | NM3510024 | Aug 16, 2024 | Unaddressed |
| Public Notice | NM3500224 | Aug 16, 2024 | Unaddressed |
| Public Notice | NM3500224 | Sep 23, 2023 | Resolved |
Practical next steps
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Questions people ask
The indexed city median is 137 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.
Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.
Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.