Louisville/Jefferson County metro government (balance)
KY

Is Louisville/Jefferson County metro government (balance), KY Tap Water Safe to Drink?

Louisville/Jefferson County metro government (balance) tap water meets federal Safe Drinking Water Act standards but 16 of 16 ZIP codes show detections above EPA health guidelines, primarily for PFPeA. A certified filter is recommended for households that want an additional layer of protection.

4Water systems
16ZIP codes
100%ZIPs above EPA guideline
Metro areaLouisville/Jefferson County, KY-IN
Latest data2025-11-04

Where Does Louisville/Jefferson County metro government (balance) Get Its Water?

Water in Louisville/Jefferson County metro government (balance), KY is provided by 4 public water systems: LOUISVILLE WATER COMPANY, MT WASHINGTON WATER COMPANY, TAYLORSVILLE WATER WORKS and WEST SHELBY WATER DISTRICT.

How Is Louisville/Jefferson County metro government (balance) Tap Water Treated?

Treated water is disinfected using free chlorine and calcium hypochlorite and on-site generated disinfectant. Treatment includes conventional treatment (coagulation, flocculation, and filtration), post-ozone biofiltration and slow sand filtration.

What's in Louisville/Jefferson County metro government (balance) Tap Water?

The following contaminants were detected most frequently in Louisville/Jefferson County metro government (balance) public water systems. 16 of 16 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
PFPeA 0.0049 µg/L 0.003 µg/L 15 ZIPs Above guideline
PFOA 0.0047 µg/L 0.004 µg/L 4 ZIPs Above guideline
lithium 9 µg/L — 0 ZIPs Within guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Louisville/Jefferson County metro government (balance)

Based on EPA monitoring data, 16 of 16 ZIP codes in Louisville/Jefferson County metro government (balance) 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 Filters for PFAS Water Profile

PFAS compounds are detected in this water supply. A reverse osmosis (RO) system or an activated-carbon filter specifically certified under NSF/ANSI P473 is required for reliable PFAS reduction. Standard pitcher and faucet filters without P473 certification do not remove PFAS.

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.

Epic Pure XP Water Filter Pitcher
Pitcher filter

NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.

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

Frequently Asked Questions about Louisville/Jefferson County metro government (balance) Tap Water

Is Louisville/Jefferson County metro government (balance) tap water safe to drink?

Louisville/Jefferson County metro government (balance) tap water meets Safe Drinking Water Act requirements but 16 of 16 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 Louisville/Jefferson County metro government (balance) tap water?

The most commonly detected contaminants in Louisville/Jefferson County metro government (balance) water systems include: PFPeA, PFOA, lithium. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Louisville/Jefferson County metro government (balance) get its drinking water?

Louisville/Jefferson County metro government (balance) receives water from 4 public water systems, including LOUISVILLE WATER COMPANY.

Do I need a water filter in Louisville/Jefferson County metro government (balance)?

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 Louisville/Jefferson County metro government (balance) tap water tested?

Public water systems in Louisville/Jefferson County metro government (balance) 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 2025-11-04.

Tap water reports by ZIP in Louisville/Jefferson County metro government (balance)

Water utilities serving Louisville/Jefferson County metro government (balance), KY

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