Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationRegional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Union County.
Your tap water
Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.
Utility hardness unavailable in this index
Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.
Find an official utility report →At a glance
EPA quarter 2026Q2
Utility-reported hardness
Unavailable
Ask your provider or test your tap
All possible systems
Review needed
1 active health-based record
Measurements by utility
Each result belongs to a specific system.
Utility match
1 system
Serves 215 people system-wide
Match the name on your water bill
These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
NM3500821 · Groundwater · 215 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
1 reported active health-based record(s) for this system
Find this utility’s official report →An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
EPA SDWIS Lead and Copper Rule samples
0% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
| Rule | Status | Period |
|---|---|---|
| Chlorine | Resolved | Feb 1, 2026 to Feb 28, 2026 |
| Consumer Confidence Rule | Resolved | Oct 1, 2025 to Mar 12, 2026 |
| Chlorine | Resolved | Aug 1, 2025 to Aug 31, 2025 |
| Chlorine | Resolved | Apr 1, 2024 to Apr 30, 2024 |
| Public Notice | Resolved | Mar 23, 2024 to Jul 16, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Nov 11, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Aug 5, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Aug 5, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Aug 8, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Nov 11, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Jul 15, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Aug 8, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Aug 8, 2024 |
| Groundwater RuleHealth-based | Resolved | Mar 8, 2023 to Aug 8, 2024 |
| Groundwater Rule | Resolved | Dec 11, 2022 to Jul 15, 2024 |
| Public Notice | Resolved | Feb 23, 2022 to Aug 18, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Aug 17, 2021 |
| Groundwater RuleHealth-based | Unaddressed | Nov 19, 2014 |
Hardness meter
121
PPM as CaCO₃
Hard
PPM
121
GPG
7.1
Regional environmental evidence
USGS hardness classification scale
121 PPM
Parts per million
121
mg/L as CaCO₃ equivalent
Grains per gallon
7.1
1 GPG ≈ 17.1 PPM
How to use regional evidence
These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.
USGS sites used
1
Nearest site
18.7 mi
Observation range
Dec 9, 2020–Dec 9, 2020
Regional evidence confidence
Low
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: 29N.28E.05.234 (Well).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Capulin median
121 PPM
About the same2 indexed ZIP readings · Range 121–121 PPM
New Mexico median
206 PPM
85 PPM lower157 indexed ZIP readings · Range 2.1–1435 PPM
Evidence-first next steps
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
An active health-based record is present. Follow the utility's current notice and public-health instructions.
Find an official utility report →Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.
Convert your hardness test result →Nearby indexed reports
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
EPA ECHO reports 1 active health-based violation among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.