3745-81-14 Maximum contaminant levels for microbiological contaminants.

 

 

 

3745-81-14                  Maximum          contaminant          levels        for                         microbiological contaminants.

 

 

 

(A)   A public water system which monitors with at least forty samples per month is in compliance with the maximum contaminant level for total coliforms when no more than 5.0 per cent of the total number of samples during a month are total coliform-positive.

 

(B)   A public water system which monitors with fewer than forty samples per month is in compliance with the maximum contaminant level for total coliforms when no more than one sample during a month is total coliform-positive.

 

(C)   Any repeat sample which is aA public water system is in violation of the maximum contaminant level for total coliforms, and may pose an acute risk to human health, if any repeat sample collected in accordance with rule 3745-81-21 of the Administrative Code is

 

(1)  Fecal coliform-positive repeat sample, or

 

(2)   Escherichia coli-positive (E. coli-positive) repeat sample, or

 

(3)     Total  coliform-positive  repeat  sample  following  a  fecal  coliform-positive routine sample, or

 

(4)   Total coliform-positive repeat sample following anE.an E. coli-positive routine sample.

 

constitutes a violation of the maximum contaminant level for total coliforms. This is a violation that may pose an acute risk to human health. Public notification shall be provided in accordance with rule 3745-81-32 of the Administrative Code.

 

(D)Failure to monitor with repeat samples as required by rule 3745-81-21 of the Administrative Code is a maximum contaminant level violation as well as a monitoring and reporting violation. Failure to monitor with the required repeat samples is a violation that may pose an acute risk to human health. Public notification shall be provided in accordance with rule 3745-81-32 of the Administrative Code.

 

(E)(D) A public water system shall determine compliance with the  maximum contaminant level for total coliforms as set forth in paragraphs (A), (B), and (C), and (D) of this rule for each period in which the public water system is required to monitor for total coliforms.

 

 

 

 

(F)(E) A public water system which exceeds any maximum contaminant level for total coliforms set forth in paragraph (A), (B), and (C), or (D) of this rule shall:

(1)   Report the violation to the director no later than the end of the next business day after the public water system learns of the violation, and

(2)    Notify the public in accordance with rule 3745-81-32 of the Administrative Code, and

(3)   Determine the source of contamination, and

(4)   Eliminate the source of contamination.

(G)(F) The director may determine that a public water system shall apply best available technology in order to reduce the level of a contaminant to below its maximum contaminant level. The best available technology for achieving compliance with the maximum contaminant level for total coliforms as set forth in this rule shall be:

(1)   Protection of wells from contamination by coliforms by appropriate placement and construction in accordance with Chapter 3745-9 of the Administrative Code; and

(2)    Maintenance of a disinfectant residual throughout the distribution system in accordance with rule 3745-81-72 of the Administrative Code and paragraph (B)(C) of rule 3745-83-01 of the Administrative Code; and

(3)     Proper maintenance of the distribution system including appropriate pipe replacement and repair procedures, main flusingflushing programs, proper operation and maintenance of storage tanks and reservoirs, and continual maintenance of positive water pressure in all parts of the distribution system, and backflow prevention as described in chapter 3745-95 of the Administrative Code; and

(4)     Filtration and disinfection by public water systems using surface water, in whole or in part, as required by rules 3745-81-71 to 3745-81-743745-81-75 of the Administrative Code, or disinfection of ground water using strong oxidants such as chlorine, chlorine dioxide, or ozone; and

(5)    Where appropriate, the development and implementation of a wellheadsource water assessment and protection program approved by the director.

Effective:                                                     01/01/2008

R.C. 119.032 review dates:                         10/11/2007 and 01/01/2013

CERTIFIED ELECTRONICALLY

Certification

12/20/2007

Date

Promulgated Under:                           119.03

Statutory Authority:                           6109.04

Rule Amplifies:                                  6109.04

Prior Effective Dates:                         12/27/78, 11/26/80, 3/1/88, 5/22/89, 12/31/90,

9/13/93, 4/1/99