1
At 8.7 GPG, Cincinnati's water qualifies as moderately hard. This can cause limescale in pipes and shorten appliance lifespan.
2
PFAS have been identified in Cincinnati's water at 2.6 parts per trillion. A reverse osmosis system is the most reliable home treatment.
3
Chlorine levels may affect the taste of Cincinnati's tap water. A carbon filter improves flavor.

Score

64 /100

Moderate

"Good" threshold (70)

Cincinnati tap water is sourced from Ohio River and treated by Greater Cincinnati Water Works. PFAS forever chemicals have been detected. Water hardness is hard at 8.7 GPG which may cause scale buildup. Overall purity score: 64/100 (Moderate). Updated for 2026.

Fix Your Water

Best filters matched to Cincinnati's 4 issues.

See Filters

MATCHED TO CINCINNATI'S WATER DATA

Best Water Filters for Cincinnati, OH (2026)

Matched to PFAS Detected, Hard Water (8.7 GPG), Moderate Chlorine in Cincinnati.

PFAS Detected Hard Water (8.7 GPG) Moderate Chlorine

Best Overall #1 for Cincinnati

Clearly Filtered Water Pitcher

Pitcher Filter

$80-95

Why this fits Cincinnati

Removes 99%+ of PFAS detected in Cincinnati's water
Eliminates chlorine taste and odor from Cincinnati's water
NSF/ANSI 42 + NSF/ANSI 53 + NSF/ANSI 401 certified

Pros & Cons +

No installation fill and pour

Removes 365+ contaminants including PFAS

Small capacity 2-3 people

Filter replacements every 4 months

Fix Your Water — Check Price

Best for PFAS

Waterdrop G3P800 Tankless RO

Tankless Reverse Osmosis

$380-450

Why this fits Cincinnati

Removes 99%+ of PFAS detected in Cincinnati's water
Eliminates chlorine taste and odor from Cincinnati's water
NSF/ANSI 58 + NSF 372 certified

Pros & Cons +

No tank saves cabinet space

800 GPD fast flow rate

Higher upfront cost

Filter replacements are proprietary

Check Price on Amazon

Best for Taste

APEC Water Systems ROES-50

Under-Sink Reverse Osmosis

$195-220

Why this fits Cincinnati

Removes 99%+ of PFAS detected in Cincinnati's water
Eliminates chlorine taste and odor from Cincinnati's water
NSF/ANSI 58 certified

Pros & Cons +

5-stage filtration removes 99%+ of contaminants

Long-lasting filters (6-12 month replacement)

Requires under-sink installation

Wastes some water during filtration

Check Price on Amazon

Best Value

Waterdrop 10UA Under-Sink Filter

Under-Sink Carbon Filter

$40-60

Why this fits Cincinnati

Eliminates chlorine taste and odor from Cincinnati's water
NSF/ANSI 42 certified
Budget-friendly at $40-60

Pros & Cons +

Very affordable

Easy DIY install no plumber

Does not remove PFAS or hardness

Single point of use only

Check Price on Amazon

As an Amazon Associate, PurityMap may earn from qualifying purchases. Based on latest Cincinnati water data.

Full Filter Comparison for Cincinnati

Know exactly what's in YOUR tap

City data shows averages. Your home may differ.

Test Your Water — $25-30

Explore Cincinnati Water Data

Cincinnati Water FAQ

Is Cincinnati OH tap water safe to drink in 2026?

Cincinnati tap water meets EPA federal drinking water standards and scores 64/100 (Moderate) on PurityMap for 2026. PFAS forever chemicals have been detected at 2.6 ppt. An NSF-certified filter is strongly recommended. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.

Does Cincinnati OH use chlorine or chloramine for disinfection?

Cincinnati uses chloramine as the primary disinfectant with a residual level of 1.7 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.

How hard is Cincinnati OH water and what is the TDS level?

Cincinnati water hardness is 8.7 grains per gallon (hard) with a TDS of 300 ppm (fair). This level causes noticeable scale buildup in water heaters kettles and dishwashers. A water softener is recommended to protect plumbing and reduce soap usage.

Has PFAS been found in Cincinnati OH drinking water?

Yes. PFAS forever chemicals have been detected in Cincinnati water at approximately 2.6 ppt according to EPA UCMR5 monitoring data. A reverse osmosis or NSF P473-certified filter is the most effective residential solution.

What is the best water filter for Cincinnati?

Based on Cincinnati's water profile, we recommend the Clearly Filtered Water Pitcher. Cincinnati: PFAS detected or elevated lead risk. Reverse osmosis is the only residential technology proven to reduce both below detection limits. TDS will also drop significantly.

Nearby Reports

ToledoOhio — 59/100 DaytonOhio — 64/100 ClevelandOhio — 77/100 YoungstownOhio — 77/100 CantonOhio — 78/100 ColumbusOhio — 79/100

All Ohio cities

Explore Water Quality by State

Compare across all 50 US states

View All States

Data Sources

EPA SDWIS
EWG Tap Water Database
Greater Cincinnati Water Works CCR
USGS monitoring data

PurityMap compiles public data. Updated March 2026.

Link copied!