Jefferson County · Louisville/Jefferson County metro
Plumbing help in Louisville, KY
Hard WaterOlder Pipes
Louisville drinks Ohio River water, some of it drawn through the riverbank itself, and its housing leans older: about six in ten homes predate 1980. Aging pipe, river-city basements and freeze-thaw winters drive most plumbing calls.
- Median home built
- 1970
- Built before 1980
- 60%
- Owner-occupied
- 60%
- Water hardness
- Hard
- ≈ 7.5 grains/gal
- Winter
- Regular hard freezes
- Plumbing code
- State code
What Louisville homeowners call plumbers about
- Sump Pump Repair and Installation
River-city basements and heavy spring rain make working sump pumps, and backups, important.
- Repiping
About 60% of homes predate 1980, and galvanized supply lines in older houses cause low pressure and leaks.
- Frozen Pipe Repair
Freeze-thaw winters catch pipes in crawl spaces, exterior walls and outdoor faucets.
Emergency plumbing in Louisville
Call (833) 878-1592Shut off your main water supply if it's safe to do so. The emergencies below are listed most likely first for Louisville homes, based on local conditions.
Hard water in Louisville: what it does to heaters and fixtures
Most of Louisville's water is treated from the Ohio River at the Crescent Hill plant; the B.E. Payne plant treats groundwater drawn through riverbank filtration. Hardness in 2025 was about 128 ppm (7.5 grains per gallon). [1]
Louisville's 1970s housing and its pipes
The median home in Louisville was built in 1970, and 60% of homes predate 1980. Homes from that era were typically built with copper supply, early plastic (ABS or PVC) drains, some cast iron.
- Galvanized steel supply (1900–1960)
- Copper supply (1950–2000)
- Polybutylene (some homes) (1978–1996)
- PEX / CPVC (1995–today)
Frozen pipe risk in Louisville
Regular hard freezes · 60% of Louisville homes were built before 1980
Permits and code in Louisville
Plumbing work in Louisville follows the Kentucky State Plumbing Code (815 KAR Chapter 20) and requires plumbers licensed by the state. [2]
Plumbing services for Louisville homes
Louisville plumbing questions
Is Louisville water hard?
Moderately. Louisville Water reported about 128 ppm, or 7.5 grains per gallon, in 2025.
Do Louisville basements need a sump pump?
Many do, especially in low-lying areas near the river or with high groundwater. Test it before spring storms by pouring water into the pit, and consider a battery backup for outages.
What is riverbank filtration?
Louisville Water draws some of its water through wells and a tunnel beside the Ohio River, so the river water is naturally filtered through sand and gravel before treatment at the B.E. Payne plant.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035) · checked 2026-10-01
- Louisville Water Company, 2025 Water Quality Report · checked 2026-10-01
- Kentucky Legislative Research Commission, 815 KAR Chapter 20 · checked 2026-10-01