Unregulated Contaminant Monitoring Rule

On a five year cycle, the 1996 Safe Drinking Water Act (SDWA) amendments require the U.S. Environmental Protection Agency (EPA) to issue a new list of no more than 30 unregulated contaminants to be monitored by public water systems under the Unregulated Contaminant Monitoring Rule (UCMR) .

Unregulated contaminants are those that do not yet have a drinking water standard set by EPA.  Our water system has sampled the first series of unregulated contaminants for the occurrence of Cyanotoxins in our drinking water in 2018.  The list of Cyanotoxins and results are provided in the table below. In 2019, a second series of sampling will be conducted for additional unregulated contaminants.

Unregulated contaminant monitoring provides data to the EPA to determine if and where certain contaminants may occur and whether the EPA should consider regulating those contaminants for the protection of public health.

Further information about the EPA's unregulated contaminant monitoring rule can be found at the EPA website or by calling the EPA's Safe Drinking Water Act Hotline at 1-800-426-4761.

Cyanotoxin Contaminants Results Table