Hardness
Hard130–150ppm
Combined reported range at two treatment plants
Borman Park: level found 140 ppm; Ogden Dunes: 143 ppm. About 7.6–8.8 gpg.
2025View source
- 1Your water
- 2Your home
- 3Your system
Lake County, Indiana Water Quality Report
Showing utility report
Indiana American Water — Northwest Indiana
2025 report; individual sample dates shown
For Northwest Indiana Operations (IN5245015). Match this system to your bill; these results do not represent every utility in Lake or Porter County.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Chloramines
Below 4 ppm MRDL2.24ppm
Highest running annual average
Individual results: 0.52–2.81 ppm.
2025View source
TTHMs
Below 80 ppb MCL24.9ppb
Highest reported locational running annual average
2025View source
HAA5
Below 60 ppb MCL12.5ppb
Highest reported locational running annual average
2025View source
Fluoride
Below 4 ppm MCL0.14ppm
Ogden Dunes result; Borman Park ND
ND means not detected, not zero.
2025View source
Lead
Below the report’s 15 ppb action level3ppb
90th percentile at sampled taps
A utility percentile is not a test at your tap.
2024View source
Copper
Below the report’s 1.3 ppm action level0.057ppm
90th percentile at sampled taps
A utility percentile is not a test at your tap.
2024View source
Nitrate
Below 10 ppm MCL0.37ppm
Ogden Dunes; Borman Park 0.28 ppm
2025View source
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Continue with your home details for general filtration guidance. We will not use another utility’s numbers as your result.
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A city report cannot establish a well’s water quality. Well-water treatment depends on your test results and site conditions.
Explore well-water systems →Water hardness by provider
The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| 130–150 ppm · hard | 2025 |
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The numbers behind your report
Selected results with the original sampling dates and measurement basis. Open the utility report for every parameter, notice and footnote.
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| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Hardness | 130–150 ppmCombined reported range at two treatment plants | 2025View source ↗ | HardBorman Park: level found 140 ppm; Ogden Dunes: 143 ppm. About 7.6–8.8 gpg. |
| Chloramines | 2.24 ppmHighest running annual average | 2025View source ↗ | Below 4 ppm MRDLIndividual results: 0.52–2.81 ppm. |
| TTHMs | 24.9 ppbHighest reported locational running annual average | 2025View source ↗ | Below 80 ppb MCL |
| HAA5 | 12.5 ppbHighest reported locational running annual average | 2025View source ↗ | Below 60 ppb MCL |
| Fluoride | 0.14 ppmOgden Dunes result; Borman Park ND | 2025View source ↗ | Below 4 ppm MCLND means not detected, not zero. |
| Lead | 3 ppb90th percentile at sampled taps | 2024View source ↗ | Below the report’s 15 ppb action levelA utility percentile is not a test at your tap. |
| Copper | 0.057 ppm90th percentile at sampled taps | 2024View source ↗ | Below the report’s 1.3 ppm action levelA utility percentile is not a test at your tap. |
| Nitrate | 0.37 ppmOgden Dunes; Borman Park 0.28 ppm | 2025View source ↗ | Below 10 ppm MCL |
In drinking water, ppm ≈ mg/L, ppb ≈ µg/L and ppt ≈ ng/L. Calculated hardness in grains per US gallon (gpg) = mg/L as CaCO₃ ÷ 17.118, rounded to one decimal. ND means below the reporting limit, not zero.
MCL is an enforceable contaminant limit; MRDL is a disinfectant limit. A secondary guideline concerns aesthetics. TTHM/HAA5 compliance uses locational running annual averages; read the utility’s notices as well as individual results.
PFAS results are compound-specific. Source monitoring, entry-point samples and tap tests are different. A detected result does not identify every PFAS compound or establish the level at your home. Read the original report for context and current utility notices. EPA PFAS benchmarks and implementation ↗
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Source water. Lake Michigan supplies the Borman Park and Ogden Dunes filtration plants. A Lake Station groundwater plant is a backup source.
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What this means for your home
The two treatment plants report separate hardness figures. Match the provider first, then confirm incoming hardness and the exact filter’s chloramine reduction performance.
No. This page summarizes Indiana American Water’s Northwest Indiana Operations. Other suppliers in Lake County publish separate reports, and groundwater or private-well results should not be inferred from these two plants.
A useful local question
Does every Lake County home get the same Lake Michigan water?
No. This page summarizes Indiana American Water’s Northwest Indiana Operations. Other suppliers in Lake County publish separate reports, and groundwater or private-well results should not be inferred from these two plants.
Sources and methodology
We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.
Official utility reports
Confirm the exact system on your water bill. Choose Other / not sure when your supplier is not summarized here.
- Indiana American Water — Northwest Indiana ↗2025 report; individual sample dates shown
- USGS hardness classification
- EPA PFAS benchmarks and implementation
Sources reviewed November 10, 2026. Individual sampling dates are shown with each result.
Your water → your home → your system
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