Columbus Drinking Water Quality
What's Really in Your Tap Water?
Columbus tap water has notable issues that residents should consider. At 233.5 ppm (13.7 gpg), the water is quite hard — you may notice mineral buildup on fixtures. Lead levels test well below the EPA action level. PFAS "forever chemicals" exceed EPA limits — a water filter is strongly recommended. No violations have been recorded in the past 3 years.
Action Needed
Quality issues detected
13.7 GPG hardness
Lead
Below EPA action level
EPA action level: 15 ppb
Hardness
Very Hard water
US Average: 100 ppm
Is Columbus Tap Water Safe to Drink?
Columbus tap water has significant quality concerns that may require action.
13 contaminants were tested in Columbus's water. 12 were detected, and 1 exceeds EPA limits.
PFAS "Forever Chemicals" — PFOA at 5.3 ppt (EPA limit: 4 ppt) — exceeds the EPA safety limit. 5 other PFAS compounds were also detected within limits.
A man-made "forever chemical" historically used in non-stick coatings (Teflon), food packaging, and firefighting foam. Linked to increased risk of kidney and testicular cancer, thyroid disease, and immune system effects.
→ A reverse osmosis (RO) or NSF-certified activated carbon filter can reduce PFOA by 90% or more.
Disinfection Byproducts — Trihalomethanes (TTHM) is at 60.7 ppb — 76% of the EPA limit (80 ppb). Within legal limits, but elevated.
A group of chemicals (chloroform, bromoform, and others) that form when chlorine used to disinfect water reacts with natural organic matter. Long-term exposure linked to increased risk of bladder cancer and liver, kidney, and central nervous system problems.
→ An activated carbon filter (pitcher, faucet-mount, or whole-house) effectively reduces trihalomethanes.
Inorganic Chemicals — Nitrate is at 6.6 ppm — 66% of the EPA limit (10 ppm). Within legal limits, but elevated.
A compound found naturally in soil and water, but elevated levels usually indicate contamination from fertilizers or sewage. Dangerous for infants — can cause "blue baby syndrome" (methemoglobinemia), which interferes with oxygen transport in the blood.
→ Reverse osmosis, ion exchange, or distillation can reduce nitrate levels. Standard carbon filters are NOT effective.
Lead — Lead (1.2 ppb) is at 8% of the EPA action level of 15 ppb.
The data below shows test results from 1 water utility serving 1.3M people in the Columbus area.
Do I Need a Water Filter?
Columbus has PFAS levels exceeding EPA limits. A reverse osmosis (RO) filter or NSF-certified activated carbon filter is recommended to reduce PFAS in your drinking water. With very hard water (233.5 ppm), a water softener can reduce scale buildup in pipes, appliances, and water heaters.
How Hard is Columbus Water?
233.5 ppm
13.7 grains per gallon
Very hard water causes significant mineral buildup. A water softener is recommended.
Impact on Your Home
Shower
Dries out skin & hair
Kitchen
Heavy mineral deposits
Laundry
Stiff, dingy clothes
Appliances
Significant scale
Regional Comparison
Values in ppm (mg/L as CaCO₃)
Do I Need a Water Softener?
At 233.5 ppm, Columbus has very hard water. A water softener is recommended to prevent scale buildup in water heaters, dishwashers, and pipes. Hard water can reduce appliance efficiency by up to 30% and increase energy costs. A whole-house water softener or salt-free conditioner can help.
Range: 79–125 ppm
Based on 106 samples from Columbus Division of Water 2024 Water Quality Report (2024)
Your pipes tell a different story
The data above shows what leaves the treatment plant—not what comes out of your faucet. Old pipes, lead solder, and building plumbing can add contaminants the city never tests for. Know exactly what's in your Columbus tap water.
Home test kits detect lead, bacteria, pesticides, and 100+ other contaminants. Results in 5-10 business days from certified labs.
Lead & Contaminants
Understanding lead levels and water quality violations in Columbus
Lead Test Results
90th Percentile Lead Level
1.2 ppb
Columbus lead levels are well within safe limits.
Regular testing is still recommended, as lead can enter water through household plumbing.
Last sampled: 2023-12-31
About Lead in Drinking Water
What is Lead in Water?
Lead is a toxic metal that can dissolve into drinking water from older pipes, solder, and fixtures. It's invisible, tasteless, and odorless, making testing the only way to detect it. The EPA has set an action level of 15 ppb, though they emphasize there is no safe level of lead exposure.
Potential Health Effects
Developmental delays, learning difficulties, lower IQ, behavioral issues
High blood pressure, kidney damage, reproductive issues
How to Reduce Exposure
- •Run water for 30 seconds to 2 minutes before drinking, especially in the morning
- •Use cold water for cooking and drinking (hot water dissolves more lead)
- •Install a NSF-certified filter designed to remove lead
- •Test your water, especially if your home was built before 1986
PFAS “Forever Chemicals”
1 PFAS chemical exceeds EPA limits
+ 2 more PFAS compounds detected
PFAS are synthetic chemicals that don't break down in the environment. A reverse osmosis or activated carbon filter can reduce PFAS levels.
Total Trihalomethanes
76% of EPA limit
Range: 19.4–103 ppb
Nitrate
66% of EPA limit
Range: 0–6.6 ppm
Haloacetic Acids
63% of EPA limit
Range: 5–38.9 ppb
Chlorine (total)
36% of EPA limit
Range: 0.91–1.62 ppm
Other Detected Contaminants
13 contaminants detected
| Contaminant | Your Water | Limit (MCL) | Status |
|---|---|---|---|
Total Trihalomethanes | 60.7 ppb Range: 19.4-103 Highest plant avg (Dublin Road). Max 103 ppb exceeds MCL in individual samples | 80 ppb | Caution 76% of limit |
Haloacetic Acids | 37.9 ppb Range: 5-38.9 Highest plant avg (Hap Cremean) | 60 ppb | Caution 63% of limit |
Fluoride | 0.96 ppm Range: 0.76-1.04 Added for dental health | 4 ppm Goal: 4 ppm | Safe 24% of limit |
Nitrate | 6.6 ppm Range: 0-6.6 Dublin Road highest at 66% of MCL. Hap Cremean 2.6, Parsons Ave ND | 10 ppm Goal: 10 ppm | Caution 66% of limit |
Chlorine (total) | 1.42 ppm Range: 0.91-1.62 MRDL 4 ppm | 4 ppm | Safe 36% of limit |
Atrazine | 0.14 ppb Range: 0-0.46 Agricultural herbicide runoff | 3 ppb Goal: 3 ppb | Safe 5% of limit |
PFBA | 8.88 ppt Range: 0-17 UCMR5 - 4/10 samples detected | N/A | Safe |
PFBS | 11.1 ppt Range: 0-11.1 UCMR5 - 1/10 samples detected | N/A | Safe |
PFHPA | 4.3 ppt Range: 0-4.3 UCMR5 - 1/10 samples detected | N/A | Safe |
PFHXA | 8.93 ppt Range: 0-18.2 UCMR5 - 3/10 samples detected | N/A | Safe |
PFOA | 5.3 ppt Range: 0-5.3 Dublin Road avg 1.3 ppt, max 5.3 ppt exceeds EPA MCL of 4 ppt - 2024 CCR + UCMR5 | 4 ppt 0 | Exceeds 133% of limit |
PFOS | 0 ppt Range: 0-0 ND - UCMR5 - 0/10 samples detected | 4 ppt 0 | Safe |
PFPEA | 6.87 ppt Range: 0-14.2 UCMR5 - 3/10 samples detected | N/A | Safe |
MCL = Maximum Contaminant Level (EPA legal limit)
EPA Compliance History
Excellent Record
No violations in past 3 yearsThis utility has maintained full EPA compliance. No action needed, but regular home testing is still recommended.
3-Year Violation Summary
0
Total Violations
0
Health-Related
0
Administrative
Health-Related Violations
Contaminant exceeded EPA safety limits. May require filter or alternative water source.
Administrative Violations
Missed testing deadlines or reporting. Does not indicate water quality issues.
Who Provides Columbus's Water?
Utility Name
COLUMBUS PUBLIC WATER SYSTEM
EPA System ID (PWSID)
OH2504412
Primary Water Source
Surface Water
Population Served
1.3M
Frequently Asked Questions
Common questions about Columbus tap water quality
Nearby Cities in Ohio
Cleveland
Very Hard water
Cincinnati
Very Hard water
Toledo City of
Very Hard water
Akron City Pws
Very Hard water
Del-co
Very Hard water
Dayton
Very Hard water
This data is for informational purposes only. Water quality can vary by neighborhood and building. For official reports, contact your local water utility or the EPA. Learn about our methodology
Data source: Columbus Division of Water 2024 Water Quality Report (2024)