Where does the water in 47561 come from?

Water for zip code 47561 in Oaktown, Indiana is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 47561

Q: Is the water hard in Oaktown, IN (47561)?

The average water hardness in 47561 is 247 PPM (14.5 GPG), which is classified as hard. A water softener is recommended to protect your plumbing and appliances.

Q: Do I need a water softener in 47561?

With hardness of 247 PPM, a water softener is recommended for homes in 47561. Hard water can cause scale buildup in pipes and appliances, spotty dishes, and dry skin.

Oaktown, Indiana · Knox County

247 PPM

14.5 GPG

Hard

0Soft60120180300+

Estimated — Nearby Data

Dataset updated March 9, 2026Matched to 2 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 2 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

2 estimated sources

This ZIP reading needs local confirmation before equipment sizing or purchase decisions.

Water source profile

Primarily groundwater

Groundwater commonly picks up calcium and magnesium after contact with rock and soil. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 47561

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

2 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Vincennes Water Department IN5242014	groundwater	237 PPM Hard	18,701	Estimated — Nearby Data
Oaktown Water Works IN5242009	groundwater	473 PPM Very Hard	832	Estimated — Nearby Data

Vincennes Water Department

IN5242014

Hard

237 PPMgroundwater18,701 servedEstimated — Nearby Data

Oaktown Water Works

IN5242009

Very Hard

473 PPMgroundwater832 servedEstimated — Nearby Data

Nearby Zip Codes

47516239 47535245 47838336 47512255 47528237 47596237 47865336 62427368 62451368 47578239 62439418 47848336

What This Means For You

Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Hard Water - Treatment Recommended

Your water is hard. Scale buildup is likely affecting your plumbing and appliances, reducing their lifespan and efficiency. A water softener is recommended to protect your home.

Recommended Products

Salt-Based Water Softener

Our PickAFWFilters Fleck 5600SXT 48K Also GreatWhirlpool WHES40E 40K Also GreatAFWFilters 64K Grain Also GreatAFWFilters Iron Pro 2 64K Also GreatSpringWell Filter + Softener Combo

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Shower Head Filter

Our PickWeddell Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

Water Softener Salt

Our PickMorton Clean & Protect Also GreatDiamond Crystal Bright & Soft

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Oaktown, IN (47561).

Submit Your Data

Frequently Asked Questions

Is the water hard in Oaktown, IN (47561)?

Our estimate for 47561 is 247 PPM (14.5 GPG), but it is based on nearby, county, or state-level data rather than a direct treated tap-water report for this exact location. Confirm with your utility or a home test.

Do I need a water softener in 47561?

Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.

Is hard water in 47561 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 47561?

Zip code 47561 in Oaktown, Indiana is served by 2 water systems.