Does Columbus tap water have PFAS?

Columbus Division of Water tests for PFAS and publishes results in its annual water quality report. Detected levels have generally been below the new EPA MCLs, but the EPA's 2024 rule set limits at 4 parts per trillion — an extremely low threshold. Individuals with health concerns, young children, or pregnant women may want additional treatment regardless of compliance status.

Does a reverse osmosis system remove PFAS?

Yes. Reverse osmosis is one of the most effective technologies for PFAS removal. An NSF/ANSI 58-certified RO system removes 95–99% of PFAS compounds including PFOA, PFOS, and GenX. The RO membrane's 0.0001-micron pore size physically blocks PFAS molecules from passing through.

How often do RO filters need to be replaced?

Pre-filters (sediment and carbon) should be replaced every 6–12 months depending on water quality. The RO membrane typically lasts 2–3 years. The post-carbon polishing filter is replaced annually. We offer an annual maintenance plan that covers all filter replacements for a flat fee.

Should I test my Columbus water for PFAS?

If you have young children, are pregnant, or have health concerns, a certified lab PFAS test ($150–250) gives you a definitive answer for your specific home. Columbus's water quality report shows system-wide averages, but levels can vary by neighborhood and time of year. We can recommend a certified lab and help you interpret the results.

PFAS Columbus, Franklin County

The problem: PFAS detected after EPA 2024 rule change

System: 5-Stage Reverse Osmosis SystemSource: City water (Columbus Division of Water)

Get Your Free Water Test (614) 476-8711

This example illustrates a common water-quality situation we encounter in Central Ohio homes. Individual water conditions and treatment recommendations vary by home.

The problem: PFAS detected after EPA 2024 rule change

In April 2024, the EPA finalized the first-ever national drinking water standard for PFAS (per- and polyfluoroalkyl substances), setting maximum contaminant levels (MCLs) at 4 parts per trillion (ppt) for PFOA and PFOS individually. Columbus homeowners who had their water tested by a certified lab after seeing news coverage of the rule sometimes found PFAS at levels that concerned them — particularly families with young children.

PFAS detected in tap water test

Concern for children's health; stopped drinking tap water immediately

Uncertainty about long-term exposure

Had been drinking tap water for 4 years without filtration

Bottled water as interim solution

Spending $60–80/month; significant plastic waste

Wanted permanent, verified solution

Needed a system with documented PFAS removal performance

What the water test found

PFASPFAS detected (certified lab results provided by customer)

Water hardness11 gpg

Total dissolved solids290 mg/L mg/L

Chloramines2.8 mg/L mg/L

Technical note: Reverse osmosis is the most effective residential technology for PFAS removal. A properly maintained RO membrane rejects 95–99% of PFAS compounds including PFOA, PFOS, and GenX. The NSF/ANSI 58 standard certifies RO systems for PFAS reduction — we only install NSF 58-certified systems for PFAS applications.

Solution: NSF 58-certified 5-stage reverse osmosis system

System: 5-Stage Reverse Osmosis System (NSF/ANSI 58 certified)

Certifications: NSF/ANSI 58 (PFAS reduction), NSF/ANSI 42 (chloramine reduction)

Sediment pre-filter (5 micron)

Removes particulates, sediment, and rust that would clog the RO membrane.

Catalytic carbon block pre-filter

Removes chloramines and chlorine that would degrade the RO membrane. Critical for Columbus water.

RO membrane (0.0001 micron)

Rejects 95–99% of dissolved contaminants including PFAS, lead, nitrates, arsenic, and fluoride. The primary treatment stage.

Post-carbon polishing filter

Final taste and odor polish before water enters the storage tank.

3-gallon storage tank + dedicated faucet

Stores treated water for on-demand use. Dedicated faucet installed at the kitchen sink.

Install time: 3 hours — Installed under the kitchen sink with a dedicated chrome faucet. Tank pressurized and system flushed before use. Post-install TDS reading confirmed effective operation.

Results: PFAS reduced to near-zero

Timeframe: 10 months

Metric	Before	After
PFAS at RO output	Detected (lab-confirmed)	Below detection limit (post-install lab test)
TDS at drinking tap	290 mg/L	14 mg/L
Chloramine taste/smell	Noticeable	Undetectable
Bottled water spending	$70/month	$0
Family confidence in water	Refused to drink tap	Drinking straight from RO tap daily

Cost comparison

System cost

$950 installed

Estimated 10-year savings

$8,400

Breakdown: Bottled water elimination ($8,400 over 10 years at $70/month). System pays for itself in 14 months. Annual filter replacement cost: ~$120/year.

Frequently asked questions

Related resources

Columbus water quality guide PFAS in drinking water RO system installation PFAS and RO filters All case studies

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