Terre Haute
Terre Haute, IN water profile — supply sources, drought status, wastewater reuse, and the key water issues facing the city.
knightsville water works
groundwater (wells) · local government · PWSID IN5211006
Below EPA's 15 ppb lead action level at last testing.
Source: EPA Safe Drinking Water Information System (SDWIS) · 2026 Q1
Terre Haute, IN is a small but growing city, with a population near 60,825 and the 12th-largest community in Indiana. Like much of Indiana, Terre Haute draws its water primarily from Ohio River, Wabash River, and glacial aquifers.
Terre Haute's water outlook is shaped most by aging infrastructure — the issue that dominates planning across Indiana. Generally adequate supply with localized concerns around industrial use and infrastructure age.
Terre Haute sits in a state that reuses roughly 4% of treated wastewater (minimal programs) and currently experiences no meaningful drought.
For the bigger picture, see the Indiana state water profile and the related issues below.
Clay County water quality
Source: EPA SDWIS · 2026 Q1
At a glance
- Population ~60,825 (12th-largest in Indiana)
- Primary sources: Ohio River, Wabash River, and glacial aquifers
- Drought: no meaningful conditions
- State reuse rate: ~4% of wastewater
Common questions
Is tap water safe in Terre Haute?
Terre Haute's largest water system, KNIGHTSVILLE WATER WORKS, serves about 1,523 people. EPA records show 1 health-based violation(s) since 2016 and a most-recent 90th-percentile lead level of 0 ppb (EPA action level is 15 ppb). Always check your own provider's annual Consumer Confidence Report.
Where does Terre Haute get its water?
KNIGHTSVILLE WATER WORKS draws primarily from groundwater (wells), part of Indiana's supply from Ohio River, Wabash River, glacial aquifers.
Related water issues
Aging Infrastructure
Much of America's water infrastructure is decades past its design life, leaking trillions of gallons a year and demanding hundreds of billions in reinvestment.
ExploreAgricultural Demand
Agriculture accounts for the majority of consumptive water use in the West, making farm efficiency and water markets central to any supply solution.
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