Manganese is widespread in Jasper County wells.
1 widespread, 2 worth checking, 4 rare out of 7 health checks.
From 19 wells tested in Jasper County since 2000; your own well needs its own test. How to read this
Rare: under 5%Worth checking: 5 to 15%Widespread: 15%+
Lab results: Water Quality Portal (USGS and EPA)
Who drinks from a well here
6 in 10 people 19,187 people
Nobody else tests these wells. Only you do.
People on wells: EPA researchers' 2020 estimate
How deep wells go here
Shallow wells: watch for fertilizer and germs from above.
Well depths: US Groundwater Well Database
Radon risk (a gas from rock)
Possible here. A home air test is inexpensive.
Radon zones: EPA map
Here's how Jasper County compares with Indiana and the counties around it.
Each result puts Jasper County next to the 8 counties that border it, on the chart's 0 to 50% scale.
This one is widespread in Jasper County wells.
Manganese3 of 19 wells over
Too few tested to show: Benton, LaPorte, Porter, Pulaski, Starke, White.
These 2 are worth checking in Jasper County.
Arsenic1 of 19 wells over
Too few tested to show: Benton, LaPorte, Porter, Pulaski, Starke, White.
Nitrate1 of 19 wells over
Too few tested to show: Benton, LaPorte, Pulaski, Starke, White.
These 4 are rare in Jasper County.
Uranium0 of 19 wells over
Too few tested to show: Benton, LaPorte, Porter, Pulaski, Starke, White.
Radon in water0 of 10 wells over
Lead0 of 19 wells over
Too few tested to show: Benton, LaPorte, Porter, Pulaski, Starke, White.
Fluoride0 of 19 wells over
Too few tested to show: Benton, LaPorte, Porter, Pulaski, Starke, White.
Every well needs a bacteria test every year.
No bacteria tests from Jasper County wells are in the public data. Test every year anyway.
Iron reached staining levels in 9 of 19 tested wells, and it isn't a health risk.
Iron stains9 of 19 wells had it
Too few tested to show: Benton, LaPorte, Porter, Pulaski, Starke, White.
Most of the 19 wells tested in Jasper County were last tested before 2010.
An old result shows the water as it was then, so treat these 19 wells as a starting point and test your own.
Most Jasper County wells in these records were tested for research or because someone suspected a problem, which can push the shares above what a typical home well would show (how we read the numbers).
One mail-in lab test covers the 4 things to check in Jasper County.
- Bacteria
- Nitrate
- Manganese
- Arsenic
What Indiana offers well owners
- Free testingIDEM's Groundwater Monitoring Network offers free well water testing to eligible private residential wells (2026 announcement at events.in.gov/event/gwmn-welltesting-2026). See the program
- Certified labsIndiana's list of certified labs
- Well recordsIndiana's well record search
Half the wells on record here are shallower than 49 feet.
That comes from 3,055 wells in Indiana's drilling records. Most wells of every kind here are 35 to 100 feet deep. Wells as shallow as Jasper County's pick up bacteria and nitrate from the surface more easily, so the yearly test matters even more here. Typical wells on record here are shallower than in 83 of the 87 other Indiana counties with enough drilling records.
Look up your own well's depth in Indiana's well record search, or see how to find it.
Well depths: US Groundwater Well Database
Here's what we know about radon and PFAS in Jasper County.
Jasper County is in the EPA's middle radon zone. An indoor air test is cheap and tells you whether to look at your water. Radon guide
Between 2023 and 2025 the EPA had 4 town water systems in Jasper County test for PFAS. None found any. No well in Jasper County has public PFAS results, so the town systems are the best clue to what's in the groundwater nearby. PFAS guide
Radon zones: EPA Map of Radon Zones. PFAS: EPA tests of town water systems, 2023 to 2025
Questions people ask about well water in Jasper County
Is well water in Jasper County safe to drink?
3 of 19 wells tested in Jasper County had manganese over the limit, about 2 in 10. Across Indiana it's about 1 in 4. That's a bigger share than in 4 of the 5 other Indiana counties with 10 or more tested wells. So test your own well for manganese before you count on it.
Can I get my well tested for free in Jasper County?
IDEM's Groundwater Monitoring Network offers free well water testing to eligible private residential wells (2026 announcement at events.in.gov/event/gwmn-welltesting-2026). If not, use a lab Indiana has certified for drinking water. Ask for bacteria, nitrate, manganese and arsenic, the tests that matter most in Jasper County.
How deep are wells in Jasper County?
Half the wells on record here are shallower than 49 feet. Typical wells on record here are shallower than in 83 of the 87 other Indiana counties with enough drilling records.
How does Jasper County compare with the counties around it?
For manganese, the share of tested wells over the limit: 1 of the 2 neighboring counties with data had a higher share than Jasper County, at 16%. Lake had the most, at 57%. Groundwater doesn't stop at county lines, so Lake's 57% is worth knowing about if you live near it.
How often should I test my well in Jasper County?
Jasper County has no public bacteria results for wells, so follow the CDC's advice: test for bacteria and nitrate every year, and right away after a flood, a repair, or any change in taste or smell.
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Where the Jasper County numbers come from
- People on wells: 19,187 in Jasper County, from EPA estimates built on the 2020 Census (Murray et al.).
- Lab tests: 206 well water samples from 19 wells in the Water Quality Portal, run by the USGS and EPA, 2000 to 2021.
- Well depths: 4 Indiana drilling records for Jasper County, gathered in the US Groundwater Well Database (Lin and others, 2024).
- Neighboring counties: the 8 counties that share a border with Jasper County, from the Census Bureau's county adjacency file.
- PFAS: EPA tests of 4 town water systems in Jasper County under the Fifth Unregulated Contaminant Monitoring Rule, 2023 to 2025.
- Radon: Jasper County is zone 2 on the EPA Map of Radon Zones.
- State programs and links: Indiana Department of Health, checked November 1, 2026.