Hardness
Very Hard
272.5 PPM · 15.9 GPG
Local water dashboard
Official source aggregationWater quality in Greencastle, IN 46135
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Putnam County.
1 reported benchmark flag
- Primary matched system
- Greencastle Department Of Water
- Source water
- Groundwater influenced by surface water + Groundwater
- County
- Putnam County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0033 mg/L
22% of action level
Utility match
5 systems
Serves 12,699 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
272.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
272.5
mg/L as CaCO₃ equivalent
Grains per gallon
15.9
1 GPG ≈ 17.1 PPM
What this means at home
At 272.5 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
4
Nearest site
32 mi
Observation range
Jan 5, 2016–May 28, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: SCHOOL BRANCH AT NOBLE DRIVE AT BROWNSBURG, IN (Stream).USGS source documentation ↗
Regional context
Is 46135 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Greencastle median
273 PPM
About the same1 indexed ZIP readings · Range 272.5–272.5 PPM
Indiana median
313 PPM
40 PPM lower472 indexed ZIP readings · Range 132–371 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)
0.0033 mg/L
Reported Dec 31, 2025
Copper (CU90)
1.81 mg/L
Reported Dec 31, 2015
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0033
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.81
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 9
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | IN5267002 | Unaddressed | Jul 2, 2025 |
| Revised Total Coliform Rule | IN5267005 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Lead and Copper Rule | IN5267005 | Resolved | Oct 1, 2023through Aug 17, 2024 |
| Consumer Confidence Rule | IN5267004 | Resolved | Jul 1, 2023through Aug 10, 2023 |
| TTHM | IN5267009 | Archived | Jan 1, 2023through Dec 31, 2023 |
| Total Haloacetic Acids (HAA5) | IN5267009 | Archived | Jan 1, 2023through Dec 31, 2023 |
| Revised Total Coliform Rule | IN5267005 | Resolved | May 1, 2022through May 31, 2022 |
| TTHM | IN5267002 | Resolved | Jan 1, 2022through Dec 31, 2022 |
| Total Haloacetic Acids (HAA5) | IN5267002 | Resolved | Jan 1, 2022through Dec 31, 2022 |
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 Greencastle ZIP 46135 using 272.5 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
272.5 PPM is 2× 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) has 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 Greencastle
Is tap water safe in Greencastle?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Nearby USGS observations produce an estimate of 272.5 PPM, or 15.9 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 272.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.