Hardness
Very Hard
312 PPM · 18.2 GPG
Local water dashboard
Official source aggregationWater quality in Peru, IN 46970
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Miami County.
4 active health-based violations
- Primary matched system
- Peru Water Department
- Source water
- Groundwater
- County
- Miami County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
4 active health-based records
Lead 90th percentile
6.6e-4 mg/L
4% of action level
Utility match
10 systems
Serves 11,417 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
312 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
312
mg/L as CaCO₃ equivalent
Grains per gallon
18.2
1 GPG ≈ 17.1 PPM
What this means at home
At 312 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
33
Nearest site
33.3 mi
Observation range
Mar 30, 2016–May 13, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: NAWQA AG WELL TP13 NEAR RIGDON, IN (Well).USGS source documentation ↗
Regional context
Is 46970 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Peru median
312 PPM
About the same1 indexed ZIP readings · Range 312–312 PPM
Indiana median
313 PPM
About the same472 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)
6.6e-4 mg/L
Reported Dec 31, 2028
Copper (CU90)
1.8 mg/L
Reported Dec 31, 2018
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 6.6e-4
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.8
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 200
- Health-based
- 10
- Active health-based
- 4
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | IN5252012 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Revised Total Coliform Rule | IN5252012 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Lead and Copper Rule | IN5252024 | Unaddressed | Jan 1, 2026 |
| Lead and Copper Rule | IN5252019 | Unaddressed | Jan 1, 2026 |
| Revised Total Coliform Rule | IN5252012 | Archived | Dec 1, 2025through Dec 31, 2025 |
| Revised Total Coliform Rule | IN5252012 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Revised Total Coliform Rule | IN5252012 | Unaddressed | Oct 20, 2025 |
| Revised Total Coliform Rule | IN5252012 | Archived | Oct 1, 2025through Oct 31, 2025 |
| Radium-228 | IN5252012 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Gross Alpha, Excl. Radon and U | IN5252012 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Radium-226 | IN5252012 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Lead and Copper Rule | IN5252001 | Unaddressed | Oct 1, 2025 |
| Consumer Confidence Rule | IN5252010 | Unaddressed | Oct 1, 2025 |
| Revised Total Coliform Rule | IN5252012 | Archived | Sep 1, 2025through Sep 30, 2025 |
| Arsenic | IN5252012 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Lead and Copper Rule | IN5252012 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | IN5252024 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | IN5252024 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | IN5252010 | Unaddressed | Jul 1, 2025 |
| Revised Total Coliform Rule | IN5252009 | Resolved | May 1, 2025through Jul 16, 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 Peru ZIP 46970 using 312 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
312 PPM is 3× 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 Peru
Is tap water safe in Peru?+
EPA ECHO reports 4 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 312 PPM, or 18.2 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 312 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.