The wind off the Altamont Pass is the first thing any pool tech notices about Tracy. It picks up in the afternoon, runs hard through the evening, and carries fine dust and field grit down onto the water almost every day of the summer. That dust is not only a skimmer problem. Organic and mineral debris feeds chlorine demand, and a pool that gets dusted daily burns sanitizer faster than a sheltered pool three towns over.

Most homes here are on the newer side, with pebble or quartz interiors, variable-speed pumps, and automation already sitting on the pad. That equipment is a good foundation for a better sanitizer setup. Add hard water on top, with calcium and alkalinity that run high across San Joaquin County, and the chemistry gets tight fast. What a lot of owners in Tracy end up with is a pool that smells strongly of chlorine, stings eyes, and still tests low on free chlorine.

That combination is the reason we install sanitizer systems (UV & chlorination) in Tracy. Nevergreen Pools works in partnership with Vintage Pool Service, a longtime Central Valley company based on East Yosemite Avenue in Manteca, so crews are close by and already know how the water behaves here, in Stockton, and in Modesto. Below is what the job actually looks like, start to finish, written for someone who leaves before the wind comes up and gets home after it dies down.

The options, and what each one actually does

Chlorine is the residual. It is the thing that stays in the water and keeps working between service visits. Everything else on this list either helps the chlorine work or cuts how much of it you need.

• Salt chlorine generators. A cell splits dissolved salt into chlorine as water passes through it. The pool still runs on chlorine, you just are not hauling jugs. Cells are rated in pounds of chlorine per day and have to be matched to gallons, not to whatever was on the shelf. In Tracy's hard water, cells scale, so plate cleaning and a correctly set output are part of ownership.
• UV sterilizers. Water passes a quartz sleeve with a lamp behind it, and the light inactivates chlorine resistant organisms on a single pass. UV holds no residual, so it works alongside a chlorine source, not instead of one. Lamps are typically replaced yearly, sleeves get cleaned on the same visit, and scale on the sleeve is the main thing that quietly dulls output in this water.
• Ozone. Injected ozone oxidizes the organic load, including the chloramines that cause the sharp chlorine smell and the eye burn people blame on too much chlorine when it is usually too little. Ozone works fast, then reverts to oxygen, so like UV it needs a chlorine source behind it.
• In-line tablet chlorinators. A simple feeder that meters trichlor tablets into the return line. Inexpensive and dependable, and often the right call on a pool with no automation, but it adds cyanuric acid and pulls pH down over time.
• Combination systems. UV or ozone paired with a salt cell or a feeder. This is the setup most wind exposed pools around here do best on. The oxidizer handles what the wind drops in, and the chlorine source keeps the residual up between visits.

Sizing comes down to two numbers, total gallons and actual flow through the pad. A variable-speed pump loafing at low RPM overnight can fall below the minimum flow a UV unit or a salt cell needs to do anything useful, so we look at the pump curve and the current schedule before specifying equipment. Undersized is the most common mistake we correct on pools that already have a system.