Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Ojo Caliente, NM 87549
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Rio Arriba County.
1 active health-based record(s) across possible systems
- Largest possible serving system
- Ojo Caliente Mdwca
- Source water
- Groundwater
- County
- Rio Arriba County
- Profile updated
Your tap water
What does the utility report?
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
What the current records say
EPA quarter 2026Q2
All possible systems
Review needed
1 active health-based record
Measurements by utility
Each result belongs to a specific system.
Utility match
2 systems
Serves 226 people system-wide
Match the name on your water bill
Your utility’s measurements and compliance records
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.
Ojo Caliente Mdwca
NM3506621 · Groundwater · 226 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 →Measurements (3)
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.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.005 mg/L
- Action level
- 0.015 mg/L
33% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.8 mg/L
- Action level
- 1.3 mg/L
138% of the listed benchmark
Monitoring period: Jan 1, 2011 to Dec 31, 2013
Combined Uranium
EPA SDWIS reported health-based violation
- Reported level
- 36 UG/L
- Maximum contaminant level
- 30 UG/L
120% of the listed benchmark
Monitoring period: Jan 1, 2023 to Mar 31, 2023
Violation history (7)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONSHealth-based | Addressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Addressed | Oct 17, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Aug 31, 2023 |
| Combined UraniumHealth-based | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| Combined UraniumHealth-based | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Combined UraniumHealth-based | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Sep 28, 2021 |
Duranes Y Gavilan Mdwca
NM3503221 · Groundwater · 215 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
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.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.009 mg/L
- Action level
- 0.015 mg/L
60% of the listed benchmark
Monitoring period: Jan 1, 2017 to Dec 31, 2019
Violation history (8)
| Rule | Status | Period |
|---|---|---|
| Public Notice | Unaddressed | Aug 16, 2025 |
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Jul 16, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Feb 17, 2026 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Feb 17, 2026 |
| Groundwater RuleHealth-based | Resolved | Oct 3, 2024 to Mar 27, 2026 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2023 to Aug 31, 2023 |
| Consumer Confidence Rule | Resolved | Oct 1, 2022 to Mar 16, 2023 |
| Lead and Copper Rule | Resolved | Oct 1, 2022 to Jul 8, 2023 |
Hardness meter
What does nearby environmental evidence show?
350
PPM as CaCO₃
Very Hard
PPM
350
GPG
20.5
Regional environmental evidence
USGS hardness classification scale
350 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
350
mg/L as CaCO₃ equivalent
Grains per gallon
20.5
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
22.7 mi
Observation range
Aug 10, 2021–Aug 10, 2021
Regional evidence confidence
Low
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: 25N.13E.17.323 (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
Is 87549 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Ojo Caliente median
350 PPM
About the same1 indexed ZIP readings · Range 350–350 PPM
New Mexico median
206 PPM
144 PPM higher157 indexed ZIP readings · Range 2.1–1435 PPM
Evidence-first next steps
Confirm the problem before choosing treatment
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.
Confirm the serving system
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
Read the current utility report
An active health-based record is present. Follow the utility's current notice and public-health instructions.
Find an official utility report →Test for the decision you face
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 →Frequently asked
Water questions for Ojo Caliente
Is tap water safe in Ojo Caliente?+
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.
How hard is the water?+
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Do I need a water softener?+
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.