Hardness
Very Hard
353.5 PPM · 20.7 GPG
Local water dashboard
Official source aggregationWater quality in Aurora, IN 47001
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Dearborn County.
1 reported benchmark flag
- Primary matched system
- Aurora Utilities
- Source water
- Groundwater
- County
- Dearborn 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
0.0041 mg/L
27% of action level
Utility match
4 systems
Serves 6,415 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
353.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
353.5
mg/L as CaCO₃ equivalent
Grains per gallon
20.7
1 GPG ≈ 17.1 PPM
What this means at home
At 353.5 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
72
Nearest site
5.8 mi
Observation range
Jun 2, 2016–Sep 10, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: IN5215006 DEARBORN 01657 PRODUCTION WELL 4 (Well).USGS source documentation ↗
Regional context
Is 47001 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Aurora median
354 PPM
About the same1 indexed ZIP readings · Range 353.5–353.5 PPM
Indiana median
313 PPM
41 PPM higher472 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)
0.0041 mg/L
Reported Dec 31, 2025
Copper (CU90)
1.42 mg/L
Reported Jun 30, 2023
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0041
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.42
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 11
- Health-based
- 3
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Consumer Confidence Rule | IN5215007 | Resolved | Jul 1, 2025through Nov 18, 2025 |
| Public Notice | IN5215005 | Resolved | Jan 1, 2025through Jul 3, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | IN5215005 | Resolved | Oct 17, 2024through Jan 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | IN5215005 | Resolved | Oct 17, 2024through Jan 31, 2025 |
| Lead and Copper Rule | IN5258001 | Resolved | Jan 1, 2024through Jul 31, 2024 |
| Lead and Copper Rule | IN5258001 | Resolved | Jan 1, 2023through Jun 28, 2023 |
| Lead and Copper Rule | IN5258001 | Resolved | Jan 1, 2023through Jul 31, 2024 |
| Lead and Copper RuleHealth-based | IN5258001 | Resolved | Jan 1, 2023through Jul 19, 2023 |
| Lead and Copper Rule | IN5258001 | Resolved | Jan 1, 2022through Dec 31, 2022 |
| Lead and Copper RuleHealth-based | IN5258001 | Resolved | Jan 1, 2022through Jul 19, 2023 |
| Lead and Copper Rule | IN5258001 | Resolved | Jan 1, 2022through Feb 28, 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 Aurora ZIP 47001 using 353.5 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
353.5 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 Aurora
Is tap water safe in Aurora?+
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 353.5 PPM, or 20.7 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 353.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.