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National Drinking Water Database

N-nitrosopyrrolidine (npyr) in California

N-nitrosopyrrolidine is a synthetic chemical with limited research use; it is classified as possibly carcinogenic to humans.

The Most Polluted Communities in California

1 water utilities reported detecting N-nitrosopyrrolidine (npyr) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average N-nitrosopyrrolidine (npyr) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Sacramento Suburban Water District
Sacramento, CA
170,0001 of 17< 0.01 ppb
(< .01 to 0.000714 ppb)

Health Based Limits for N-nitrosopyrrolidine (npyr)

There are no health based standards that EWG is using for this chemical

Violation Summary for N-nitrosopyrrolidine (npyr) in California

There are no violations reported for this contaminant in California