Is Greencastle, IN tap water safe?
The short answer
1 of the 5 utilities serving Greencastle has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Greencastle Department of Water.
Greencastle Department of Water, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 6.6 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Greencastle’s ZIP codes, from EPA’s estimates.
- Open report
Greencastle Department of Water
Indiana · serves 12,699 people · about 350 in Greencastle
2 results above the health goal. The worst: Arsenic at 6.6 ppb, above the health goal.
2 health-based violations since 2016
- Open report
Putnamville Correctional Facility
Indiana · serves 2,505 people · under 100 in Greencastle
1 result above the health goal. The worst: Lead at 3.3 ppb, above the health goal.
No health-based violations since 2016
- Open report
South 43 Water Association, Inc.
Indiana · serves 1,431 people · under 100 in Greencastle
1 result above the health goal. The worst: Lead at 7.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Town of Fillmore Utilities
Indiana · serves 510 people · lists Greencastle among the places it serves
Nothing in its records is above a health goal.
No health-based violations since 2016
- Open report
Big Walnut Water Company
Indiana · serves 500 people · lists Greencastle among the places it serves
1 result above the health goal. The worst: Lead at 1.4 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Greencastle Department of Water’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Greencastle
The 3 labs Indiana certifies closest to Greencastle, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
BBP Water Corp
Spencer, IN · about 26 miles
Certified for bacteria
Montgomery CHD Microbiology Laboratory
Crawfordville, IN · about 27 miles
Certified for bacteria
Delta Water Management Group, Inc.
Brownsburg, IN · about 31 miles
Certified for bacteria
Indiana Department of Health laboratory: Test kits for well water: nitrate, fluoride, and arsenic, lead and copper, ordered from the lab and returned by mail. They are open to the public. Nitrate is $10 a sample plus $6.50 shipping per order, fluoride $10 plus shipping, and the arsenic, lead and copper kit $20 plus $6.50 shipping. Water Testing, Indiana Department of Health.
All 81 certified labs for IndianaZIP codes in Greencastle
Which ZIP codes are in Greencastle: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Indiana Department of Health, certified drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Greencastle
Towns nearby with a page of their own.
What to do next
- Read Greencastle Department of Water’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water