Résumé :
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[BDSP. Notice produite par INIST-CNRS l998R0x7. Diffusion soumise à autorisation]. Objectives. Oxidation reduction potential (ORP) is a more direct measure of water quality in swimming pools and spas than free chlorine. However, ORP is not considered in some state pool codes, including Minnesota's. This study examined whether compliance with the Minnesota Pool Code assured an ORP>=650 millivolts (mV), a value defined in the literature as adequate to kill viral and bacterial pathogens within seconds. We also examined predictors of ORP. Methods. Water samples from public swimming pools and spas in Hennepin County, Minnesota, were collected during routine health inspections from May through August 2004 and assessed for compliance with the state pool code. ORP values were also recorded. A Chi-square test was used to evaluate the association between code compliance and ORP. Analysis of covariance (ANCOVA) and logistic regression models were used to determine predictors of ORP. Results. The study included 132 pools and 30 spas. Compliance with the Minnesota Pool Code did not assure an ORP>=650 mV (p=650 mV in their swimming pool regulations. Doing so would likely benefit the health of swimmers.
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