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Marion County, Indiana Water Quality Report

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Citizens Water — Indianapolis

2025 report; individual sample dates shown

For Citizens Water’s Indianapolis system (IN5249004). Treatment-plant data are shared with Morgan County; the distribution and tap results below are the Indianapolis entries.

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

317ppm

Average; approximately 18.5 gpg

System range: 148–460 ppm; not a reading at your home.

2025View source

Chloramines

Below 4 ppm MRDL

2.0ppm

Average, measured as total chlorine

Range: 0.09–2.9 ppm.

2025View source

TTHMs

Below 80 ppb MCL

58ppb

Highest reported locational running annual average

Individual samples: 22–70 ppb.

2025View source

HAA5

Below 60 ppb MCL

38ppb

Highest reported locational running annual average

Individual samples: 12–40 ppb.

2025View source

Fluoride

Below 4 ppm MCL

0.89ppm

Maximum; average 0.57 ppm

2025View source

Lead

Below the report’s 15 ppb action level

4.7ppb

90th percentile at sampled taps

2 of 106 sampled sites exceeded the report’s action level; system percentile was below it.

2025View source

Copper

Below the report’s 1.3 ppm action level

0.097ppm

90th percentile at sampled taps

A utility percentile is not a test at your tap.

2025View source

Nitrate

Below 10 ppm MCL

4.0ppm

Maximum; average 1.1 ppm

2025View source

Water hardness by provider

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

UtilityHardnessHardness source
317 ppm average · very hard2025
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
Hardness317 ppmAverage; approximately 18.5 gpg2025View source ↗Very hardSystem range: 148–460 ppm; not a reading at your home.
Chloramines2.0 ppmAverage, measured as total chlorine2025View source ↗Below 4 ppm MRDLRange: 0.09–2.9 ppm.
TTHMs58 ppbHighest reported locational running annual average2025View source ↗Below 80 ppb MCLIndividual samples: 22–70 ppb.
HAA538 ppbHighest reported locational running annual average2025View source ↗Below 60 ppb MCLIndividual samples: 12–40 ppb.
Fluoride0.89 ppmMaximum; average 0.57 ppm2025View source ↗Below 4 ppm MCL
Lead4.7 ppb90th percentile at sampled taps2025View source ↗Below the report’s 15 ppb action level2 of 106 sampled sites exceeded the report’s action level; system percentile was below it.
Copper0.097 ppm90th percentile at sampled taps2025View source ↗Below the report’s 1.3 ppm action levelA utility percentile is not a test at your tap.
Nitrate4.0 ppmMaximum; average 1.1 ppm2025View 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 ↗

Hardness source ↗USGS hardness classification ↗

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Source water. Citizens uses surface-water supplies and groundwater. The 2025 table distinguishes shared treatment-plant results from Indianapolis distribution and tap sampling.

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More about your local water

What this means for your home

Older plumbing can affect tap lead even when the system’s percentile is below an action level. Use a tap test for a plumbing-specific concern, and evaluate filtration and softening as separate jobs.

Citizens Water’s Indianapolis data are useful for homes on that system. Marion County is a geographic boundary, not a single water service area. Choose the name on your bill; a private well needs its own test.

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

A useful local question

Why start with the utility name in Marion County?

Citizens Water’s Indianapolis data are useful for homes on that system. Marion County is a geographic boundary, not a single water service area. Choose the name on your bill; a private well needs its own test.

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 10, 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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