(1) E. coli MCL Violation. A system is in violation of the MCL for E. coli when any of the conditions identified in paragraphs (1)(a) through (1)(d) of this section occur.
- (a) The system has an E. coli-positive repeat sample following a total coliform-positive routine sample.
- (b) The system has a total coliform-positive repeat sample following an E. coli-positive routine sample.
- (c) The system fails to take all required repeat samples following an E. coli-positive routine sample.
- (d) The system fails to test for E. coli when any repeat sample tests positive for total coliform.
(2) Treatment technique violation.
- (a) A treatment technique violation occurs when a system exceeds a treatment technique trigger specified in R309-211-8(1) and then fails to conduct the required assessment or corrective actions within the timeframe specified in R309-211-8(2) and (3).
- (b) A treatment technique violation occurs when a seasonal system fails to complete a Director-approved start-up procedure prior to serving water to the public.
(3) Monitoring violations.
- (a) Failure to take every required routine or additional routine sample in a compliance period is a monitoring violation.
- (b) Failure to analyze for E. coli following a total coliform-positive routine sample is a monitoring violation.
(4) Reporting violations.
- (a) Failure to submit a monitoring report or completed assessment form after a system properly conducts monitoring or assessment in a timely manner is a reporting violation.
- (b) Failure to notify the Director following an E. coli-positive sample as required by R309-211-7(2)(a) in a timely manner is a reporting violation.
- (c) Failure to submit certification of completion of Director-approved start-up procedure by a seasonal system is a reporting violation.
KEY: drinking water, distribution system monitoring, total coliform, compliance determinations
Date of Last Change: January 15, 2019
Notice of Continuation: February 10, 2025
Authorizing, and Implemented or Interpreted Law: 19-4-104