Hardness
Hard
144 PPM · 8.4 GPG
Local water dashboard
Official source aggregationWater quality in Navajo Dam, NM 87419
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.
2 active health-based violations
- Primary matched system
- Navajo Dam Domestic Water Consumers Inc
- Source water
- Surface water + Groundwater influenced by surface water
- County
- San Juan County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
2 active health-based records
Lead 90th percentile
0.01 mg/L
67% of action level
Utility match
2 systems
Serves 545 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
144 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
144
mg/L as CaCO₃ equivalent
Grains per gallon
8.4
1 GPG ≈ 17.1 PPM
What this means at home
At 144 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
101
Nearest site
8.7 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: SAN JUAN RIVER NEAR ARCHULETA, NM (Stream).USGS source documentation ↗
Regional context
Is 87419 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Navajo Dam median
144 PPM
About the same1 indexed ZIP readings · Range 144–144 PPM
New Mexico median
228 PPM
84 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 pass2 fail
Lead (PB90)
0.01 mg/L
Reported Jun 30, 2026
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
3 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.01
EPA limit 0.015
TTHM
Measured in MG/L
Local 0.086
EPA limit 0.08
Total Haloacetic Acids (HAA5)
Measured in MG/L
Local 0.129
EPA limit 0.06
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 111
- Health-based
- 17
- Active health-based
- 2
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | NM3501024 | Archived | Mar 1, 2026through Mar 31, 2026 |
| Surface Water Treatment Rule | NM3501024 | Archived | Mar 1, 2026through Mar 31, 2026 |
| Surface Water Treatment Rule | NM3536724 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Interim Enhanced Surface Water Treatment Rule | NM3536724 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Chlorine | NM3501024 | Resolved | Feb 1, 2026through Feb 28, 2026 |
| Surface Water Treatment Rule | NM3501024 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Interim Enhanced Surface Water Treatment Rule | NM3501024 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Revised Total Coliform Rule | NM3501024 | Resolved | Feb 1, 2026through Feb 28, 2026 |
| Revised Total Coliform Rule | NM3501024 | Resolved | Jan 1, 2026through Jan 31, 2026 |
| Interim Enhanced Surface Water Treatment Rule | NM3501024 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Lead and Copper Rule | NM3501024 | Unaddressed | Jan 1, 2026 |
| Surface Water Treatment Rule | NM3501024 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Chlorine | NM3501024 | Resolved | Jan 1, 2026through Jan 31, 2026 |
| Surface Water Treatment Rule | NM3501024 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | NM3501024 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Chlorine | NM3501024 | Resolved | Dec 1, 2025through Dec 31, 2025 |
| Revised Total Coliform Rule | NM3501024 | Resolved | Dec 1, 2025through Dec 31, 2025 |
| Revised Total Coliform Rule | NM3501024 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Chlorine | NM3501024 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Surface Water Treatment Rule | NM3501024 | Archived | Nov 1, 2025through Nov 30, 2025 |
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 Navajo Dam ZIP 87419 using 144 PPM nearby hardness and 3 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
144 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
TTHM, Total Haloacetic Acids (HAA5) 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 Navajo Dam
Is tap water safe in Navajo Dam?+
EPA ECHO reports 2 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 144 PPM, or 8.4 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 144 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.