1. About 12% of assessed wastewater facilities and collection systems were flagged as at risk The UCLA project team presented separate risk assessments for wastewater discharge requirements (WDR) facilities, NPDES facilities, and collection systems. Across those groups, about 12% were classified as at risk, 18% as potentially at risk, and 70% as not at risk. Operational, sociodemographic, and environmental factors account for 50%, 35%, and 15% of the risk assessments, respectively. Scores are not directly comparable across the three program types. The assessments are planning screens, not compliance determinations.
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