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Public Notification for Disinfectant Residual Violations

Lookup table to determine what kind of notice to issue for these violations. Links to templates for mandatory language and instructions for issuing notice.

Disinfectant Residual Violations and Public Notice Requirements

§290.110(a)(2) and §290.110(a)(4)

Event

Violation Type & link to
Mandatory Health Effects Language

Public Notice
Requirement

· Failure to take samples

· Failure to report sample results, if requested

Monitoring and/or reporting violation

§290.122(c)

· The residual entering the distribution system falls below the acceptable level for more than 4.0 consecutive hours (Surface Water Treatment Plants and Ground Water Under the Influence of Surface Water)

Treatment technique violation

§290.122(b)

· The second month in a row that more than 5.0 % of the residuals in the distribution system fall below the acceptable level

Treatment technique violation

§290.122(b)