Hardness
Hard
147 PPM · 8.6 GPG
Local water dashboard
Official source aggregationWater quality in Aztec, NM 87410
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for San Juan County.
8 active health-based violations
- Primary matched system
- Aztec Domestic Water System
- Source water
- Surface water + Groundwater
- County
- San Juan County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
8 active health-based records
Lead 90th percentile
7.0e-4 mg/L
5% of action level
Utility match
4 systems
Serves 9,673 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
147 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
147
mg/L as CaCO₃ equivalent
Grains per gallon
8.6
1 GPG ≈ 17.1 PPM
What this means at home
At 147 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
105
Nearest site
3.4 mi
Observation range
Feb 16, 2016–Mar 30, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: ANIMAS RIVER DISCRETE SAMPLE 13 (Stream).USGS source documentation ↗
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
147 PPM
About the same1 indexed ZIP readings · Range 147–147 PPM
New Mexico median
228 PPM
81 PPM lower194 indexed ZIP readings · Range 74.2–688.5 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass1 fail
Lead (PB90)
7.0e-4 mg/L
Reported Jun 30, 2026
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 7.0e-4
EPA limit 0.015
Selenium
Measured in MG/L
Local 0.06
EPA limit 0.05
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 35
- Health-based
- 11
- Active health-based
- 8
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Groundwater RuleHealth-based | NM3500324 | Unaddressed | Dec 24, 2025 |
| Public Notice | NM3509824 | Unaddressed | Nov 7, 2025 |
| Lead and Copper Rule | NM3509824 | Unaddressed | Oct 1, 2025 |
| Groundwater Rule | NM3500324 | Unaddressed | Sep 28, 2025 |
| Surface Water Treatment Rule | NM3520024 | Resolved | Feb 1, 2025through Feb 28, 2025 |
| Interim Enhanced Surface Water Treatment Rule | NM3520024 | Resolved | Feb 1, 2025through Feb 28, 2025 |
| Total Haloacetic Acids (HAA5) | NM3520024 | Archived | Oct 1, 2024through Dec 31, 2024 |
| TTHM | NM3520024 | Archived | Oct 1, 2024through Dec 31, 2024 |
| Revised Total Coliform Rule | NM3509824 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| E. COLI | NM3500324 | Resolved | Aug 17, 2023through Aug 23, 2023 |
| Groundwater RuleHealth-based | NM3500324 | Resolved | Aug 9, 2023through Aug 29, 2023 |
| Groundwater RuleHealth-based | NM3500324 | Resolved | Aug 9, 2023through Sep 16, 2023 |
| Public Notice | NM3500324 | Resolved | Mar 22, 2023through Jun 12, 2023 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Aztec ZIP 87410 using 147 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
147 PPM is 1× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsDrinking water protection
Under-Sink Reverse Osmosis System
Selenium, Groundwater Rule have a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
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?+
Nearby USGS observations produce an estimate of 147 PPM, or 8.6 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 147 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.