Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Aztec, NM 87410
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for San Juan County.
8 active health-based record(s) across possible systems
- Largest possible serving system
- Aztec Domestic Water System
- Source water
- Surface water + Groundwater
- County
- San Juan 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
8 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
4 systems
Serves 9,673 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.
Aztec Domestic Water System
NM3509824 · Surface water · 9,673 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
- 7.0e-4 mg/L
- Action level
- 0.015 mg/L
5% of the listed benchmark
Monitoring period: Jan 1, 2026 to Jun 30, 2026
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Public Notice | Unaddressed | Nov 7, 2025 |
| Lead and Copper Rule | Unaddressed | Oct 1, 2025 |
| Revised Total Coliform Rule | Resolved | Sep 1, 2024 to Sep 30, 2024 |
Northstar Mdwca
NM3520024 · Surface water · 3,784 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 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Surface Water Treatment Rule | Resolved | Feb 1, 2025 to Feb 28, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Resolved | Feb 1, 2025 to Feb 28, 2025 |
| Total Haloacetic Acids (HAA5) | Archived | Oct 1, 2024 to Dec 31, 2024 |
| TTHM | Archived | Oct 1, 2024 to Dec 31, 2024 |
Southside Mutual Domestic Water
NM3509924 · Surface water · 1,609 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
- 0.005 mg/L
- Action level
- 0.015 mg/L
33% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Public Notice | Unaddressed | Jun 13, 2013 |
Rosa Joint Ventures Water System
NM3500324 · Groundwater · 239 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
8 reported active health-based record(s) for this system
Find this utility’s official report →Measurements (2)
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
- 0.002 mg/L
- Action level
- 0.015 mg/L
13% of the listed benchmark
Monitoring period: Jan 1, 2016 to Dec 31, 2018
Selenium
EPA SDWIS reported health-based violation
- Reported level
- 0.06 MG/L
- Maximum contaminant level
- 0.05 MG/L
120% of the listed benchmark
Monitoring period: Oct 1, 2021 to Dec 31, 2021
Violation history (27)
| Rule | Status | Period |
|---|---|---|
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Dec 24, 2025 |
| Groundwater Rule | Unaddressed | Sep 28, 2025 |
| E. COLI | Resolved | Aug 17, 2023 to Aug 23, 2023 |
| Groundwater RuleHealth-based | Resolved | Aug 9, 2023 to Aug 29, 2023 |
| Groundwater RuleHealth-based | Resolved | Aug 9, 2023 to Sep 16, 2023 |
| Public Notice | Resolved | Mar 22, 2023 to Jun 12, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Oct 12, 2022 |
| Public Notice | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Public Notice | Resolved | Mar 13, 2022 to Aug 31, 2022 |
| Public Notice | Resolved | Jan 1, 2022 to May 17, 2023 |
| Public Notice | Resolved | Dec 10, 2021 to Jan 30, 2025 |
| Consumer Confidence Rule | Resolved | Oct 1, 2021 to Oct 9, 2024 |
| Lead and Copper Rule | Resolved | Oct 1, 2021 to Aug 28, 2023 |
| SeleniumHealth-based | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| E. COLI | Resolved | Aug 25, 2021 to May 27, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Sep 6, 2024 |
| Revised Total Coliform Rule | Resolved | Apr 1, 2021 to Apr 30, 2021 |
| Public Notice | Unaddressed | Jan 9, 2021 |
| Revised Total Coliform Rule | Resolved | Jan 1, 2021 to Jan 31, 2021 |
| Consumer Confidence Rule | Unaddressed | Oct 19, 1999 |
Hardness meter
What does nearby environmental evidence show?
133.5
PPM as CaCO₃
Hard
PPM
133.5
GPG
7.8
Regional environmental evidence
USGS hardness classification scale
133.5 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
133.5
mg/L as CaCO₃ equivalent
Grains per gallon
7.8
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
42
Nearest site
3.4 mi
Observation range
Jul 19, 2021–Mar 26, 2026
Regional evidence confidence
High
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: ANIMAS RIVER DISCRETE SAMPLE 13 (Stream).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 87410 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Aztec median
134 PPM
About the same1 indexed ZIP readings · Range 133.5–133.5 PPM
New Mexico median
206 PPM
72 PPM lower157 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 Aztec
Is tap water safe in Aztec?+
EPA ECHO reports 8 active health-based violations 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.