Columbus
Columbus, OH water profile — supply sources, drought status, wastewater reuse, and the key water issues facing the city.
columbus public water system
surface water (rivers/reservoirs) · local government · PWSID OH2504412
Below EPA's 15 ppb lead action level at last testing.
Source: EPA Safe Drinking Water Information System (SDWIS) · 2026 Q1
Columbus, OH is a major U.S. city, with a population near 850,106 and the largest community in Ohio. Like much of Ohio, Columbus draws its water primarily from Lake Erie, Ohio River, and aquifers.
Columbus's water outlook is shaped most by aging infrastructure — the issue that dominates planning across Ohio. Lake Erie algal blooms, which once shut off Toledo's water, are a recurring quality threat.
Columbus sits in a state that reuses roughly 3% of treated wastewater (minimal programs) and currently experiences no meaningful drought.
For the bigger picture, see the Ohio state water profile and the related issues below.
Franklin County water quality
Source: EPA SDWIS · 2026 Q1
At a glance
- Population ~850,106 (largest in Ohio)
- Primary sources: Lake Erie, Ohio River, and aquifers
- Drought: no meaningful conditions
- State reuse rate: ~3% of wastewater
Common questions
Is tap water safe in Columbus?
Columbus's largest water system, COLUMBUS PUBLIC WATER SYSTEM, serves about 1,305,946 people. EPA records show 1 health-based violation(s) since 2016 and a most-recent 90th-percentile lead level of 1.2 ppb (EPA action level is 15 ppb). Always check your own provider's annual Consumer Confidence Report.
Where does Columbus get its water?
COLUMBUS PUBLIC WATER SYSTEM draws primarily from surface water (rivers/reservoirs), part of Ohio's supply from Lake Erie, Ohio River, 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.
ExplorePFAS Contamination
Per- and polyfluoroalkyl substances persist in water supplies for decades. New federal limits are forcing utilities nationwide to invest in advanced treatment.
ExploreAlgal Blooms
Nutrient pollution and warming water are fueling toxic algae outbreaks that can shut down drinking-water intakes — as Toledo learned in 2014.
ExploreLead Contamination
Millions of lead service lines still connect homes to water mains. After Flint, a national push — backed by new EPA rules — aims to rip them all out.
Explore