Delaware
OH

Is Delaware, OH Tap Water Safe to Drink?

Delaware 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 data2024-04-08

Where Does Delaware Get Its Water?

Water in Delaware, OH is provided by 2 public water systems: DELAWARE CITY PWS and DEL-CO WATER COMPANY, INC..

How Is Delaware Tap Water Treated?

Treated water is disinfected using chloramines and free chlorine and on-site generated disinfectant. Treatment includes conventional treatment (coagulation, flocculation, and filtration), membrane filtration and slow sand filtration.

What's in Delaware Tap Water?

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

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 12.9 µg/L 10 µg/L 1 ZIP Above guideline
PFBA 0.0082 µg/L — 1 ZIP Within guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
PFHxA 0.0062 µg/L — 1 ZIP Within guideline
PFPeA 0.0054 µg/L — 1 ZIP Within guideline

Health Risk Profile for Delaware

Based on EPA monitoring data, 1 of 1 ZIP codes in Delaware 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 Delaware Tap Water

Is Delaware tap water safe to drink?

Delaware 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 Delaware tap water?

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

Where does Delaware get its drinking water?

Delaware receives water from 2 public water systems, including DELAWARE CITY PWS.

Do I need a water filter in Delaware?

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 Delaware tap water tested?

Public water systems in Delaware 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 2024-04-08.

Tap water reports by ZIP in Delaware

Water utilities serving Delaware, 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.

Also covers / overlaps with