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Analysis of Wastewater Samples to Explore Community Substance Use in the United States: Pilot Correlative and Machine Learning Study

Analysis of Wastewater Samples to Explore Community Substance Use in the United States: Pilot Correlative and Machine Learning Study

Sampling rates, Rs (L/d), were used from previously published studies (see Table 2 for values). Collective excretion rates (CER) were calculated by the following formula [22]: CER=Cw Q (2) where Q is the plant flow rate (L/day×g/109 ng). The CER per capita was calculated by dividing the CER by the population served and converting g to µg. The population served was determined by information reported by the wastewater treatment plant.

Marie A Severson, Sathaporn Onanong, Alexandra Dolezal, Shannon L Bartelt-Hunt, Daniel D Snow, Lisa M McFadden

JMIR Form Res 2023;7:e45353