Hardness
Moderately Hard
111 PPM · 6.5 GPG
Local water dashboard
Official source aggregationWater quality in Dunsmuir, CA 96025
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Siskiyou County.
1 active health-based violation
- Primary matched system
- Dunsmuir, City Of
- Source water
- Groundwater
- County
- Siskiyou County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0.0066 mg/L
44% of action level
Utility match
1 system
Serves 1,707 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
111 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
111
mg/L as CaCO₃ equivalent
Grains per gallon
6.5
1 GPG ≈ 17.1 PPM
What this means at home
At 111 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
71
Nearest site
3.6 mi
Observation range
Oct 23, 2017–Mar 20, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 039N004W13JS01M (Spring).USGS source documentation ↗
Regional context
Is 96025 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Dunsmuir median
111 PPM
About the same1 indexed ZIP readings · Range 111–111 PPM
California median
189 PPM
78 PPM lower678 indexed ZIP readings · Range 3.3–728.5 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)
0.0066 mg/L
Reported Dec 31, 2025
Copper (CU90)
1.62 mg/L
Reported Dec 31, 1994
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0066
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.62
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 2
- Health-based
- 1
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONSHealth-based | CA4710002 | Addressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | CA4710002 | Addressed | Oct 17, 2024 |
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 Dunsmuir ZIP 96025 using 111 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Copper (90th percentile), LEAD AND COPPER RULE REVISIONS 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 Dunsmuir
Is tap water safe in Dunsmuir?+
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?+
Nearby USGS observations produce an estimate of 111 PPM, or 6.5 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.