Municipal Affairs and Environment

Standard Operating Procedures for Removing Boil Water Advisories

As part of the studies conducted under the Boil Water Advisory (BWA) Reduction Initiative, several tools have been developed to help reduce the number of BWAs in the province. The tools developed will help communities identify the causes of BWAs, corrective measures and actions to take to have the BWAs lifted, and preventative measures so that the community does not go back on BWA. The tools include:

  1. BWA System Assessment Tool PDF Icon (77 KB)
  2. Examples of completed BWA System Assessment Tool
    1. Greenspond PDF Icon (389 KB)
    2. Trepassey PDF Icon (392 KB)
  3. Report on Development of Standard Operating Procedures for the Reduction of Boil Water Advisories in Newfoundland and Labrador PDF Icon (6.12 MB)
  4. Preventative Maintenance Checklists, Logs and Forms
    1. Maintenance Forms PDF Icon (79 KB)
    2. Daily Logs PDF Icon (56 KB)
  5. Disinfection Presentations
    1. Public and Community Members PDF Icon (268 KB)
    2. Disinfection System Operators PDF Icon (480 KB)
  6. Fact Sheets
    1. Disinfection PDF Icon (390 KB)
    2. Microbiological Parameters PDF Icon (412 KB)
    3. Chemical Parameters PDF Icon (331 KB)
    4. Physical Parameters PDF Icon (334 KB)
    5. Disinfection By Products PDF Icon (330 KB)
    6. Operator Education Opportunities PDF Icon (275 KB)
  7. Full Cost Accounting Assessment Tool
    1. Assessment Tool PDF Icon (2 MB)
    2. User Manual PDF Icon (636 KB)
  8. 2018 Boil Water Advisory Reduction Initiative PDF Icon (490 KB)
  9. Standard Operating Procedures:
SOP# BWA Reason Code BWA Reason Code Description
1 A Water supply has no disinfection system
2 B1 Chlorination system is turned off by the operator, due to taste or other aesthetic conditions
3 B2 Chlorination system is turned off by the operator, due to perceived health risks
4 B3 Chlorination system is turned off by the operator, due to lack of funds to operate
5 C1 Disinfection system is off due to maintenance or mechanical failure
6 C2 Disinfection system is off due to lack of chlorine or other disinfectant
7 D1 Water distribution system is undergoing maintenance or repairs
8 D2 A cross connection is discovered in the distribution system
9 D3 Inadequately treated water was introduced into the system due to fire flows, flushing operations, interconnections, minor power outage or other pressure loss
10 E1 Water entering the distribution system or facility, after a minimum 20 minute contact time does not have a free chlorine residual of at least 0.3 mg/L or equivalent CT value
11 E2 No free chlorine residual detected in the water distribution system
12 E3 Insufficient residual disinfectant in water system primarily disinfected by means other than chlorination
13 F3 Total coliforms detected and confirmed in repeat sample
14 F2E Escherichia coli (E.coli) detected and repeat samples cannot be taken as required
F4 Escherichia coli (E.coli) detected in an initial sample(s) is considered extensive and the water system has other known problems
F5 Escherichia coli (E.coli) detected and confirmed in repeat sample
15 F6 Viruses detected (ex. Hepatitis A, Norwalk)
16 F7 Protozoa detected (ex. Giardia, Cryptosporidium)
17 G Water supply system integrity compromised due to disaster (ex. Contamination of water source from flooding, gross contamination, major power failures, etc.)
18 H Waterborne disease outbreak in the community
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