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County of Los Angeles
Department of Public Health
Environmental Health
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Recommended Chemical Levels in Swimming Pools and Spas

  Minimum Ideal Maximum
Free chlorine residual Pools 2.0 2.0 - 3.0 Per Label to 10.0
Free chlorine residual, Spas Wading pools and Spray Grounds 3.0 3.0 - 4.0 Per Label to 10.0
Combined chlorine 0 0 0.4
Bromine, Pools 2 4.5 - 6.5 Per Label to 22.0
Bromine, Spas Wading pools and Spray Grounds 4 6.5 - 7.5 Per Label to 22.0
Oxidation-reduction Potential (ORP) 650 mV - 900 mV
pH 7.2 7.4 - 7.6 7.8
Cyanuric acid 0 30 - 50 100
Total alkalinity 80 100 - 150 180
Calcium Hardness 150 200 - 300 500
Copper 0 0 0.3
Iron 0 0 0.2
Total dissolved solids:
Swimming pools
Spa pools



2,000 over start
1,500 over start

All readings are in parts per million unless otherwise indicated.

Note: Currently, the legal minimum free chlorine residual in public pools in California is 1.0 ppm for pools not using stabilizer (cyanuric acid) and 2.0 ppm for pools using stabilizer.

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Areas of Interest
Popular Links
arrow2013-2014 License/Permit Fees

arrowBeware: Health Inspector Imposters

arrowBody Art

arrowCertified Food Handler & Manager:
arrowCommunity Events

arrowCottage Food Operation

arrowDrinking Water Report

arrowFood Facility (Restaurant/Market) Ratings

arrowFood Facility Closures

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All Recalls for 2015:

arrowGuidelines for Safe Food Donation

arrowInspect Your Home Kitchen

arrowMobile Food Facility Route Sheet

arrowMotion Picture Catering Operation Permit
arrowPet Dogs in Outdoor Dining Areas

arrowPlan Check Guides:
arrowSwimming Pool Inspection Details

arrowSwimming Pool Closure List

arrowWhat to Expect as a Food Operator
Director of Environmental Health
Angelo J. Bellomo
Director's Biography
Los Angeles County Seal: Enriching lives through effective and caring services