Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Navajo Dam, NM 87419
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for San Juan County.
2 active health-based record(s) across possible systems
- Largest possible serving system
- Navajo Dam Domestic Water Consumers Inc
- Source water
- Surface water + Groundwater influenced by surface water
- 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
2 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
2 systems
Serves 545 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.
Navajo Dam Domestic Water Consumers Inc
NM3536724 · Surface water · 545 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 (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
- 0.01 mg/L
- Action level
- 0.015 mg/L
67% of the listed benchmark
Monitoring period: Jan 1, 2026 to Jun 30, 2026
TTHM
EPA SDWIS reported health-based violation
- Reported level
- 0.086 MG/L
- Maximum contaminant level
- 0.08 MG/L
108% of the listed benchmark
Monitoring period: Jan 1, 2023 to Mar 31, 2023
Total Haloacetic Acids (HAA5)
EPA SDWIS reported health-based violation
- Reported level
- 0.129 MG/L
- Maximum contaminant level
- 0.06 MG/L
215% of the listed benchmark
Monitoring period: Oct 1, 2021 to Dec 31, 2021
Violation history (32)
| Rule | Status | Period |
|---|---|---|
| Surface Water Treatment Rule | Archived | Feb 1, 2026 to Feb 28, 2026 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Feb 1, 2026 to Feb 28, 2026 |
| Lead and Copper Rule | Unaddressed | Oct 1, 2025 |
| Consumer Confidence Rule | Unaddressed | Oct 1, 2025 |
| TTHMHealth-based | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| TTHMHealth-based | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Public Notice | Resolved | Sep 24, 2022 to May 2, 2023 |
| TTHMHealth-based | Resolved | Jul 1, 2022 to Sep 30, 2022 |
| Public Notice | Resolved | Jul 1, 2022 to Jul 13, 2022 |
| TTHMHealth-based | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Public Notice | Resolved | Jan 28, 2022 to Jul 13, 2022 |
| Public Notice | Resolved | Jan 28, 2022 to Jul 13, 2022 |
| TTHMHealth-based | Resolved | Jan 1, 2022 to Mar 31, 2022 |
| TTHM | Resolved | Nov 1, 2021 to Jan 31, 2022 |
| Total Haloacetic Acids (HAA5) | Resolved | Nov 1, 2021 to Jan 31, 2022 |
| Public Notice | Resolved | Oct 30, 2021 to Oct 30, 2021 |
| Public Notice | Resolved | Oct 30, 2021 to Oct 30, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| TTHMHealth-based | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| TTHMHealth-based | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| Public Notice | Resolved | Aug 7, 2021 to Oct 30, 2021 |
| Public Notice | Resolved | Aug 7, 2021 to Oct 30, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| TTHMHealth-based | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Aug 30, 2021 |
| Public Notice | Resolved | May 30, 2021 to Oct 30, 2021 |
| Public Notice | Resolved | May 30, 2021 to Oct 30, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Apr 1, 2021 to Jun 30, 2021 |
| TTHMHealth-based | Resolved | Apr 1, 2021 to Jun 30, 2021 |
| Public Notice | Resolved | Feb 28, 2021 to Oct 30, 2021 |
| TTHMHealth-based | Resolved | Jan 1, 2021 to Mar 31, 2021 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2021 to Mar 31, 2021 |
Pine River Mdca
NM3501024 · Groundwater influenced by surface water · 44 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
2 reported active health-based record(s) for this system
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
- 0.163 mg/L
- Action level
- 0.015 mg/L
1087% of the listed benchmark
Monitoring period: Jan 1, 2017 to Dec 31, 2019
Violation history (79)
| Rule | Status | Period |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Archived | Mar 1, 2026 to Mar 31, 2026 |
| Surface Water Treatment Rule | Archived | Mar 1, 2026 to Mar 31, 2026 |
| Chlorine | Resolved | Feb 1, 2026 to Feb 28, 2026 |
| Surface Water Treatment Rule | Archived | Feb 1, 2026 to Feb 28, 2026 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Feb 1, 2026 to Feb 28, 2026 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2026 to Feb 28, 2026 |
| Revised Total Coliform Rule | Resolved | Jan 1, 2026 to Jan 31, 2026 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Jan 1, 2026 to Jan 31, 2026 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2026 |
| Surface Water Treatment Rule | Archived | Jan 1, 2026 to Jan 31, 2026 |
| Chlorine | Resolved | Jan 1, 2026 to Jan 31, 2026 |
| Surface Water Treatment Rule | Archived | Dec 1, 2025 to Dec 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Dec 1, 2025 to Dec 31, 2025 |
| Chlorine | Resolved | Dec 1, 2025 to Dec 31, 2025 |
| Revised Total Coliform Rule | Resolved | Dec 1, 2025 to Dec 31, 2025 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| Chlorine | Resolved | Nov 1, 2025 to Nov 30, 2025 |
| Surface Water Treatment Rule | Archived | Nov 1, 2025 to Nov 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Nov 1, 2025 to Nov 30, 2025 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2025 to Oct 31, 2025 |
| Chlorine | Archived | Oct 1, 2025 to Oct 31, 2025 |
| Consumer Confidence Rule | Unaddressed | Oct 1, 2025 |
| Surface Water Treatment Rule | Archived | Sep 1, 2025 to Sep 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Sep 1, 2025 to Sep 30, 2025 |
| Revised Total Coliform Rule | Resolved | Sep 1, 2025 to Sep 30, 2025 |
| Chlorine | Resolved | Sep 1, 2025 to Sep 30, 2025 |
| Surface Water Treatment Rule | Archived | Aug 1, 2025 to Aug 31, 2025 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2025 to Aug 31, 2025 |
| Chlorine | Resolved | Aug 1, 2025 to Aug 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Aug 1, 2025 to Aug 31, 2025 |
| Revised Total Coliform Rule | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Jul 1, 2025 to Jul 31, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Surface Water Treatment Rule | Archived | Jul 1, 2025 to Jul 31, 2025 |
| Chlorine | Resolved | Jul 1, 2025 to Jul 31, 2025 |
| Chlorine | Archived | Jun 1, 2025 to Jun 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Jun 1, 2025 to Jun 30, 2025 |
| Surface Water Treatment Rule | Archived | Jun 1, 2025 to Jun 30, 2025 |
| Revised Total Coliform Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | May 1, 2025 to May 31, 2025 |
| Surface Water Treatment Rule | Archived | May 1, 2025 to May 31, 2025 |
| Revised Total Coliform Rule | Resolved | May 1, 2025 to May 31, 2025 |
| Chlorine | Archived | May 1, 2025 to May 31, 2025 |
| Revised Total Coliform Rule | Resolved | Apr 1, 2025 to Apr 30, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Apr 1, 2025 to Apr 30, 2025 |
| Surface Water Treatment Rule | Archived | Apr 1, 2025 to Apr 30, 2025 |
| Chlorine | Archived | Apr 1, 2025 to Apr 30, 2025 |
| Surface Water Treatment Rule | Archived | Mar 1, 2025 to Mar 31, 2025 |
| Revised Total Coliform Rule | Resolved | Mar 1, 2025 to Mar 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Mar 1, 2025 to Mar 31, 2025 |
| Chlorine | Archived | Mar 1, 2025 to Mar 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Feb 1, 2025 to Feb 28, 2025 |
| Chlorine | Archived | Feb 1, 2025 to Feb 28, 2025 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2025 to Feb 28, 2025 |
| Surface Water Treatment Rule | Archived | Feb 1, 2025 to Feb 28, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Archived | Jan 1, 2025 to Jan 31, 2025 |
| Surface Water Treatment Rule | Archived | Jan 1, 2025 to Jan 31, 2025 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2025 |
| LEAD AND COPPER RULE REVISIONS | Addressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Addressed | Oct 17, 2024 |
| Revised Total Coliform RuleHealth-based | Resolved | Oct 1, 2024 to Oct 31, 2024 |
| Consumer Confidence Rule | Resolved | Oct 1, 2024 to Mar 15, 2026 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2024 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2024 |
| Consumer Confidence Rule | Resolved | Oct 1, 2023 to Mar 15, 2026 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Apr 5, 2024 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2023 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2023 |
| Consumer Confidence Rule | Resolved | Oct 1, 2022 to Mar 15, 2026 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Mar 29, 2024 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2022 |
| Public Notice | Resolved | Jun 3, 2022 to Jul 26, 2023 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2022 |
| Public Notice | Resolved | Nov 14, 2021 to Aug 31, 2022 |
| Consumer Confidence Rule | Resolved | Oct 1, 2021 to Mar 15, 2026 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Mar 29, 2024 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2021 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | Addressed | Apr 1, 2010 |
Hardness meter
What does nearby environmental evidence show?
128.5
PPM as CaCO₃
Hard
PPM
128.5
GPG
7.5
Regional environmental evidence
USGS hardness classification scale
128.5 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
128.5
mg/L as CaCO₃ equivalent
Grains per gallon
7.5
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
30
Nearest site
8.7 mi
Observation range
Jul 29, 2021–Mar 25, 2026
Regional evidence confidence
High
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: SAN JUAN RIVER NEAR ARCHULETA, NM (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 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
129 PPM
About the same1 indexed ZIP readings · Range 128.5–128.5 PPM
New Mexico median
206 PPM
77 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 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?+
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.