London
OH

Is London, OH Tap Water Safe to Drink?

London tap water meets federal Safe Drinking Water Act standards but 1 of 1 ZIP code show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

2Water systems
1ZIP codes
100%ZIPs above EPA guideline
Metro areaColumbus, OH
Latest data2024-01-10

Where Does London Get Its Water?

Water in London, OH is provided by 2 public water systems: LONDON CITY PWS and MADISON COUNTY SSWD WATER DISTRICT 1.

How Is London Tap Water Treated?

Treated water is disinfected using chloramines and free chlorine. Treatment includes conventional treatment (coagulation, flocculation, and filtration) and slow sand filtration.

What's in London Tap Water?

The following contaminants were detected most frequently in London public water systems. 1 of 1 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 13 µg/L 10 µg/L 1 ZIP Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline
8:2 FTS 0.005 µg/L — 0 ZIPs Within guideline
6:2 FTS 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for London

Based on EPA monitoring data, 1 of 1 ZIP codes in London have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about London Tap Water

Is London tap water safe to drink?

London tap water meets Safe Drinking Water Act requirements but 1 of 1 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in London tap water?

The most commonly detected contaminants in London water systems include: lithium, PFTrDA, 11Cl-PF3OUdS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does London get its drinking water?

London receives water from 2 public water systems, including LONDON CITY PWS.

Do I need a water filter in London?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is London tap water tested?

Public water systems in London are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2024-01-10.

Tap water reports by ZIP in London

Water utilities serving London, OH

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

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