Hardness
Hard
129 PPM · 7.5 GPG
Local water dashboard
Official source aggregationWater quality in Londonderry, VT 05148
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Windham County.
1 active health-based violation
- Primary matched system
- Magic Village Water Coop
- Source water
- Groundwater
- County
- Windham 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
0.0012 mg/L
8% of action level
Utility match
4 systems
Serves 308 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
129 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
129
mg/L as CaCO₃ equivalent
Grains per gallon
7.5
1 GPG ≈ 17.1 PPM
What this means at home
At 129 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
63
Nearest site
6 mi
Observation range
May 19, 2016–Aug 2, 2023
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: VT- AN 01 (Well).USGS source documentation ↗
Regional context
Is 05148 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Londonderry median
129 PPM
About the same1 indexed ZIP readings · Range 129–129 PPM
Vermont median
98 PPM
31 PPM higher93 indexed ZIP readings · Range 10.5–176 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)
0.0012 mg/L
Reported Dec 31, 2025
Copper (CU90)
2.16 mg/L
Reported Jun 30, 2011
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0012
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 2.16
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 18
- Health-based
- 2
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Nitrate | VT0005577 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | VT0005577 | Addressed | Oct 17, 2024 |
| Revised Total Coliform RuleHealth-based | VT0005577 | Resolved | Jul 1, 2023through Jul 31, 2023 |
| Gross Alpha, Excl. Radon and U | VT0005577 | Resolved | Jan 1, 2023through Mar 31, 2023 |
| TTHM | VT0005577 | Resolved | Jan 1, 2023through Dec 31, 2023 |
| Total Haloacetic Acids (HAA5) | VT0005577 | Resolved | Jan 1, 2023through Dec 31, 2023 |
| CYANIDE | VT0005294 | Resolved | Oct 1, 2022through Dec 31, 2022 |
| Nitrate | VT0020151 | Resolved | Oct 1, 2022through Dec 31, 2022 |
| Radium-226 | VT0020151 | Resolved | Oct 1, 2022through Dec 31, 2022 |
| Radium-228 | VT0020151 | Resolved | Oct 1, 2022through Dec 31, 2022 |
| Consumer Confidence Rule | VT0005294 | Resolved | Jul 1, 2022through Oct 12, 2022 |
| E. COLI | VT0005577 | Resolved | Nov 28, 2021through Nov 29, 2021 |
| Nitrate | VT0005294 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Chlorine | VT0005294 | Resolved | Apr 1, 2021through Jun 20, 2021 |
| Asbestos | VT0005294 | Resolved | Jan 1, 2021through Mar 31, 2021 |
| Lead and Copper Rule | VT0005294 | Resolved | Jan 1, 2021through Oct 10, 2022 |
| Revised Total Coliform Rule | VT0005294 | Unaddressed | May 12, 2020 |
| Consumer Confidence RuleReported 0 | VT0005577 | Unaddressed | Jul 1, 2002 |
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 Londonderry ZIP 05148 using 129 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
129 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
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 Londonderry
Is tap water safe in Londonderry?+
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 129 PPM, or 7.5 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 129 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.