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LaPorte County, Indiana Water Quality Report

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City of La Porte Water Works

June 2026 report; sampling years shown

For City of La Porte Water Works (IN5246017). Michigan City and other LaPorte County suppliers publish separate reports.

Your water at a glance

See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.

Hardness

Very hard

≈330ppm

Undated utility guidance; about 19.2 gpg

The utility FAQ provides an approximate setting, not a 2025 annual average.

Undated utility FAQView source

Chlorine

Below 4 ppm MRDL

0.63ppm

Highest running annual average

Individual range: 0.22–1.13 ppm.

2025View source

TTHMs

Below 80 ppb MCL

18ppb

Highest reported locational running annual average

2024–2025View source

HAA5

Below 60 ppb MCL

9ppb

Highest reported locational running annual average

2024–2025View source

Fluoride

Below 4 ppm MCL

0.67ppm

Highest reported result

April 16, 2023View source

Lead

Below the report’s 15 ppb action level

3.5ppb

90th percentile at sampled taps

One sampled site exceeded the report’s action level; range 0.51–41 ppb.

2020–2023View source

Copper

Below the report’s 1.3 ppm action level

0.34ppm

90th percentile at sampled taps

A utility percentile is not a test at your tap.

2020–2023View source

Nitrate

Below 10 ppm MCL

<0.10ppm

Reported result, measured as nitrogen

October 20, 2025View source

Water hardness by provider

The figures below are provider-specific. They are not a countywide average.

UtilityHardnessHardness source
About 330 ppm · very hardUndated utility FAQ
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.

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.

Open the complete utility report ↗

What was measuredReported amountSample year / source dateHow to read it
Hardness≈330 ppmUndated utility guidance; about 19.2 gpgUndated utility FAQView source ↗Very hardThe utility FAQ provides an approximate setting, not a 2025 annual average.
Chlorine0.63 ppmHighest running annual average2025View source ↗Below 4 ppm MRDLIndividual range: 0.22–1.13 ppm.
TTHMs18 ppbHighest reported locational running annual average2024–2025View source ↗Below 80 ppb MCL
HAA59 ppbHighest reported locational running annual average2024–2025View source ↗Below 60 ppb MCL
Fluoride0.67 ppmHighest reported resultApril 16, 2023View source ↗Below 4 ppm MCL
Lead3.5 ppb90th percentile at sampled taps2020–2023View source ↗Below the report’s 15 ppb action levelOne sampled site exceeded the report’s action level; range 0.51–41 ppb.
Copper0.34 ppm90th percentile at sampled taps2020–2023View source ↗Below the report’s 1.3 ppm action levelA utility percentile is not a test at your tap.
Nitrate<0.10 ppmReported result, measured as nitrogenOctober 20, 2025View source ↗Below 10 ppm MCL
PFAS screenND 29 PFAS compounds screenedJune 24, 2025View source ↗Not detectedThe report lists no detections for the 29-compound UCMR screen.

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 ↗

Hardness source ↗USGS hardness classification ↗

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Source water. La Porte pumps groundwater from the Kankakee River Basin aquifer through eight wells in four wellfields and treats it at two plants.

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More about your local water

What this means for your home

City of La Porte Water Works and Michigan City are separate suppliers. This page uses the La Porte system and its utility FAQ for approximate hardness.

The report contains sampling periods as old as 2020–2023 alongside 2025 measurements. Dates stay attached to the results so an older tap-sampling round is not mistaken for a new home test.

Filter vs. softener: what each doesPlan installation with your plumber

A useful local question

Is La Porte’s 330 ppm hardness a 2025 annual average?

No. Approximately 330 ppm, or 19.2 grains per gallon, comes from the city’s undated water FAQ. It is practical utility guidance; test incoming hardness to confirm your installation settings.

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.

Sources reviewed November 12, 2026. Individual sampling dates are shown with each result.

Your water → your home → your system

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Choose the system size, keep useful existing equipment, and review your filtration goals.

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