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 a

 

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

 

(F)    A public water system which exceeds any maximum contaminant level for total coliforms set forth in paragraph (A), (B), (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)    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 rules 3745-81-72 and 3745-83-02 of the Administrative Code; and

(3)     Proper maintenance of the distribution system including appropriate pipe replacement and repair procedures, main flusing 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

(4)     Filtration and disinfection by public water systems using surface water, in whole or in part, as required by rules 3745-81-71 to 3745-81-74 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 wellhead protection program approved by the director.

R.C. 119.032 review dates:    10/23/2003

CERTIFIED ELECTRONICALLY

Certification

10/23/2003

Date

Promulgated Under:   119.03

Statutory Authority:   RC Section 6109.04 Rule Amplifies:                                    RC Section 6109.04

Prior Effective Dates: 12/27/78, 11/26/80, 03/01/88,

05/22/89, 12/31/90, 09/13/93,

04/01/99