Why Your Rock Hill Water Tastes Like “Pool Water” in March

If your tap water suddenly tastes or smells like pool water in March, it is often because the water system is doing a temporary chlorine flush, also called a free chlorine conversion.

That means the utility may temporarily use free chlorine instead of the normal chlorine-ammonia disinfectant blend, called chloramine, to clean and maintain the water distribution system. This is a common maintenance practice for systems that use chloramine.

Why does it smell stronger?

Free chlorine has a sharper smell and taste than chloramine.

So even when the water is still within drinking-water standards, homeowners may notice:

• pool-like smell
• stronger chlorine taste
• cloudy water after hydrant flushing
• slight pressure changes
• discoloration if sediment is stirred up

Rock Hill provides water regionally to Rock Hill customers and wholesale customers including Fort Mill, Tega Cay, York County, the Catawba Indian Nation, and other smaller suppliers.

Is the water unsafe?

Not automatically.

A chlorine taste by itself does not mean the water is unsafe. Public water systems disinfect drinking water to control bacteria and meet state and federal drinking-water rules. South Carolina DES notes that public drinking water quality is regulated under the Safe Drinking Water Act and EPA health-based standards.

But do not ignore these signs:

• brown, rusty, or muddy water that does not clear
• oily film
• rotten egg smell
• illness after drinking
• water pressure suddenly drops and stays low
• a boil-water advisory is issued

What can you do at home?

Try this first:

Run cold water for a few minutes from a bathtub or utility sink.

Use a carbon filter pitcher or refrigerator filter.

Let a pitcher of water sit uncovered in the fridge for a few hours.

Flush your water heater only if you know how to do it safely.

Do not adjust plumbing, remove water heater parts, or open municipal-side valves to “fix” the taste.

When should you call a plumber?

Call if only your home has the problem, especially if you notice:

• chlorine smell only from hot water
• metallic taste
• black particles
• recurring sediment
• low pressure
• old galvanized piping
• water heater odor or discoloration

If the whole neighborhood notices it in March, it is more likely a utility treatment change than a house plumbing failure.

The goal is not to replace parts blindly. The goal is to figure out whether the taste is coming from the public water supply, your home’s plumbing, or your water heater.