Water testing
Pool water testing in Austin
Every weekly visit from Sullivan’s tests chlorine, pH, alkalinity, calcium hardness and stabilizer and corrects them on site, with what was added written down. For residential pools, CDC recommends pH of 7.0–7.8 and free chlorine of at least 1 ppm, or at least 2 ppm when cyanuric acid or stabilized chlorine is used. Surface and equipment instructions also matter when deciding corrections.
What actually gets measured
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Sanitizer
Free and total chlorine — plus salt level and cell output on salt systems.
Corrected on site, with what was added written down.
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Balance
pH, total alkalinity and calcium hardness.
Langelier saturation checked, not just the individual numbers.
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Stabilizer
Cyanuric acid, read alongside the chlorine product label and water test.
Phosphate and metals tested when the water says it is warranted.
Service availability is confirmed for your address and the requested work. See the areas we cover.
What a pool water test checks
Weekly service checks free and total chlorine, pH, alkalinity, calcium hardness and stabilizer. Salt systems also need salt-level and cell-output checks. The visit note records what was added and what needs attention, so a single reading is not the whole maintenance record.
Water testing between weekly service visits
CDC recommends testing chlorine and pH at least twice daily and more often during heavy use. The weekly service schedule and the homeowner’s testing schedule serve different purposes. Follow product and equipment instructions when interpreting readings or deciding on a correction.
Pool water testing by area
Pool water testing in Northwest Hills · Pool water testing in South Austin · Pool water testing in West Lake Hills · Pool water testing in Tarrytown · Pool water testing in Great Hills · Pool water testing in River Place · Pool water testing in Crestview · Pool water testing in East Austin · Pool water testing in North Austin · Pool water testing in West Campus · Pool water testing in Hyde Park · Pool water testing in Downtown Austin · Pool water testing in St. Johns · Pool water testing in Bee Cave · Pool water testing in Cedar Park · Pool water testing in Georgetown · Pool water testing in Leander · Pool water testing in Pflugerville · Pool water testing in Round Rock
The detail, in full
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What this service involves, start to finish
- Free and total chlorine, pH, total alkalinity, calcium hardness, cyanuric acid
- Salt level and cell output on salt systems
- Langelier saturation checked, not just the individual numbers
- Correction dosed on site, with what was added written down
- Phosphate and metals testing when the water says it is warranted
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What causes calcium scale on pool tile in Austin?
Pool water builds up dissolved solids over time, mineral salts and treatment chemicals, as EPA’s pool guidance notes, and fill water can add more. Scale assessment also needs the actual water readings and surface condition. Austin Water publishes supply-quality reports, but soil beneath a property does not measure the water at its tap. Test the pool and its fill source rather than diagnosing from a ZIP code.
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How should I manage cyanuric acid in my pool?
Read the chlorine product label and measure cyanuric acid when deciding treatment. CDC notes that chlorine disinfection takes longer when cyanuric acid is present and recommends at least 2 ppm free chlorine for pools using it. CDC recommends against cyanuric acid and stabilized chlorine in hot tubs. Do not treat a high reading as a DIY instruction to drain.
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Why does my chlorine disappear so fast in summer?
CDC identifies sunlight and material introduced by swimmers among the things that reduce chlorine concentration. Test chlorine and pH routinely, following the test manufacturer’s directions, rather than assuming a cause from heat, smell or color. Contact us about repeated low readings so the water and equipment can be assessed together.
These are the questions about pool water testing and chemical balancing. Every question we are asked often is answered across the whole site.
Technical references: CDC chlorine, pH and stabilizer guidance; Austin Water quality reports; EPA pool mineral buildup guidance. These references support general guidance, not a claim about contractor credentials or the condition of a particular pool.
Tell us about your pool
Tell us your service location and whether you need weekly care, help with equipment, or a one-time service. Call or send the quote form. We’ll confirm availability and the next step for your pool. Repairs and other separately quoted work are discussed before approval.