City water profile

Water hardness in Hammond

Find official utility reports, understand hardness, and check the water system serving your home in Hammond, Indiana.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 1
Active health records: 0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Hammond Water Works Department

IN5245020 · Surface water · 78,384 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.003 mg/L
Action level: 0.015 mg/L

20% of the listed benchmark

Monitoring period: Jan 1, 2025 to Dec 31, 2025

Violation history (7)

Imported violation history for Hammond Water Works Department
Rule	Status	Period
Atrazine	Resolved	Oct 1, 2024 to Dec 31, 2024
LASSO	Resolved	Oct 1, 2024 to Dec 31, 2024
Di(2-ethylhexyl) phthalate	Resolved	Oct 1, 2024 to Dec 31, 2024
Di(2-ethylhexyl) adipate	Resolved	Oct 1, 2024 to Dec 31, 2024
Simazine	Resolved	Oct 1, 2024 to Dec 31, 2024
Revised Total Coliform Rule	Resolved	Aug 1, 2021 to Oct 4, 2021
Lead and Copper Rule	Resolved	Jul 1, 2021 to Nov 19, 2021

City summary

What the indexed records say

Hammond has 5 published ZIP profiles across Lake County. The regional-evidence median is 218 PPM. The city does not meet the stricter comparison standard.

The 217.5–217.5 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard5 ZIPs

5 of 5 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 4.5 miles
Profiles with evidence: 5/5

Confidence labels

High: 0Moderate: 0Low: 5

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Indiana communities

Cedar Lake

Lake County

249 PPM median

Crown Point

Lake County

218 PPM median

Dyer

Lake County

218 PPM median

East Chicago

Lake County

218 PPM median

Gary

Lake County

218 PPM median

Griffith

Lake County

218 PPM median

Search all 386 Indiana cities →

Questions people ask

About water in Hammond

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.