Why shower before swimming in your Austin pool?

If you own a pool or spa in Austin, the CDC's swimmer-hygiene guidance applies to your backyard as much as to anyone else's. Sullivan's Pool Service is a local pool and spa service company in Austin, and it sends a technician to each pool it maintains on a set day each week. Below is what the CDC says about showering before you swim, how that habit connects with chloramines, and what the Austin Water quarterly table reports about the tap water you may use to top your pool up.

Rinse before you get in

The CDC asks swimmers to shower for at least 1 minute before entering a pool, and it lists the materials to keep out of the water: urine, feces, dirt and sweat. Its guidance on chloramines names rinsing before entry as a prevention step, so the two documents point the same way.

The rinse sits inside a larger set of behavior rules. The CDC also says not to urinate or defecate in the pool, not to swallow pool water, and to stay out entirely when someone has diarrhea. Read together, these recommendations mean that healthy water depends on swimmer conduct as well as on the disinfectant in the pool. Nobody in your household is exempt, and the habit applies before the first swim as much as before any later one.

The chloramine connection

Chloramines form when chlorine binds to body waste that swimmers introduce. The CDC describes irritation of the skin, eyes and respiratory tract among their effects, and it pays particular attention to indoor pools, where chloramines can move from the water into air that is poorly ventilated.

The pre-swim rinse addresses one part of this: what a swimmer carries into the water. Regular testing addresses the condition of the water itself, and ventilation addresses polluted indoor air. The CDC includes all of these in its guidance, and it does not present the shower as a replacement for any of the others. Your rinse works alongside your water care; it does not stand in for it.

Keep chlorine and pH checks in the routine

For residential pools, the CDC gives a typical disinfectant range of 1 to 4 ppm chlorine, or 3 to 8 ppm when bromine is the disinfectant, with pH from 7.0 to 7.8. It says to check disinfectant and pH at least twice each day, and more often during heavy use.

The pH reading matters on its own terms. Outside that recommended range, the CDC says pH can reduce disinfectant effectiveness, irritate eyes and skin, and damage equipment. A household that follows the swimmer-hygiene advice faithfully still needs to watch both readings. Following the chemical product labels is part of the guidance as well, along with keeping pool chemicals secured away from children and pets.

Combined chlorine

Combined chlorine is found by subtracting free chlorine from total chlorine. According to the CDC, most city, county and state health departments limit combined chlorine in water to 0.4 ppm or less. For a home pool, a combined chlorine reading that stays high is a reason to have the water assessed.

Children and the area around the pool

The CDC's advice for children is practical: bathroom breaks and diaper checks every hour, with diaper changes made away from poolside. These steps keep waste out of the water while children are using it.

The broader safety guidance includes continuous close supervision of swimmers, basic swimming and water-safety skills, and Coast Guard-approved life jackets used as directed. It also calls for four-sided fencing with gates that close and latch themselves, along with window or door locks and alarms. A pre-swim rinse fits within this wider routine of swimmer behavior, water care and precautions around the pool.

What Austin Water reports about fill water

Austin Water publishes quarterly summaries of finished drinking water from its three plants, Davis, Ullrich and Handcox. In the Austin Water quarterly table, the pH of the finished water was 9.70 at Davis, 9.74 at Ullrich and 9.65 at Handcox. Total hardness as CaCO3 was 76 mg/L at the Davis plant tap, 77 mg/L at Ullrich and 77 mg/L at Handcox. Total alkalinity as CaCO3 was 52 mg/L at the Davis tap, 51 mg/L at Ullrich and 60 mg/L at Handcox. Total chloramines in finished water were 2.69 mg/L at Davis, 2.52 mg/L at Ullrich and 2.60 mg/L at Handcox.

Keep these figures in perspective. They are quarterly averages for tap water sampled at the plants, not readings of any one pool. Test the pool itself rather than assuming anything from the utility table.

Next step: water testing and chemistry service.

Sources

• Centers for Disease Control and Prevention: Guidelines for Keeping Your Pool Safe and Healthy
• Centers for Disease Control and Prevention: Chloramines and Pool Operation
• Austin Water: Water Quality Summary, 2nd Quarter 2026 (April 1 to June 30, 2026)

In Austin

Fill water matters here. Austin Water reported finished water leaving its three plants in the second quarter of 2026 at pH 9.65 to 9.74, total hardness of 76 to 77 mg/L as CaCO3, total alkalinity of 51 to 60 mg/L, and 2.52 to 2.69 mg/L of chloramines. Those are averages for tap water, not readings of your pool, so test the pool itself after a top-up.

Source: Austin Water, Water Quality Summary, 2nd Quarter 2026 (samples April 1 to June 30, 2026), finished water at the Davis, Ullrich and Handcox plant taps.

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Sullivan’s Pool Service maintains pools in and around Austin, including Northwest Hills, South Austin, West Lake Hills, Tarrytown, Great Hills, River Place, Crestview, East Austin, North Austin, West Campus, Hyde Park, Downtown Austin and St. Johns, and in Bee Cave, Cedar Park, Georgetown, Leander, Pflugerville and Round Rock. See every service area.

Weekly residential service has one fixed monthly price, set by pool size: see pool service pricing for what each size tier covers.