Laurentian Valley Waterworks is a distribution system only, that purchases treated water from the Pembroke Drinking Water System and distributes it to 640homes and businesses throughout 14 kilometres of distribution piping.

Laurentian Valley Water Works received a Certificate as a Water Distribution Plant, Level 1 (WD1) in November of 2000, #2893. On July 15, 2005 the system was reclassified as Water Distribution Subsystem Class 1 by the Ministry of Environment. The Drinking Water System Information number for Laurentian Valley Water Works is W260007465.

On June 2, 2011 the Corporation of the Township of Laurentian Valley was issued Municipal Drinking Water License #192-101, Issue #1, as both the Owner and Operating Authority. On March 30, 2016 Issue #2 was issued for a 5-year term. On February 8, 2021 Issue #3 was issued, licensing the system for a further 5 years.

On May 31, 2011 the Corporation of the Township of Laurentian Valley was issued a Drinking Water Works Permit Number 192-201, Issue #1 for the system described by the system maps as of February 2009, as amended from time to time, by Form 1 - Record of Watermains. The Permit was renewed on March 30, 2016 and the system maps were updated to September of 2019.

Water quality data collected during each quarter will be presented on this site along with the annual reports and any other pertinent information. If you have any questions about these reports please contact one of the following:

  • Mark Behm, Public Works Manager, 613-735-6291 ext. 216
  • Brad Faught, Water Quality Analyst, Quality Management Representative, 613-735-6291 ext. 204

View our complete Waterworks Reports


View our Water Financial Statements

Water term definitions

 Maximum Acceptable Concentration, is a health standard known to have adverse effects.
Interim Maximum Acceptable Concentration, suspected adverse health effects but not feasible for practical reasons to establish a MAC.
 Adverse test result
Is a test that fails, where the results exceed the MAC or IMAC, and retesting and boil water advisories must be issued.
Means that no traces were found in the sample submitted for testing.
 E. Coli
Escherichia coli. is a fecal coliform that can be detected by using membrane filtration or presence/absence tests and should not be detected in any drinking water sample. Because E coli. is rapidly destroyed by chlorine, it is a good indicator of recent fecal pollution.
 Heterotrophic plate count
HPC, A laboratory procedure for estimating the total bacteria count in a water sample. Also called standard plate count, total plate count, or total bacterial count. The sample is incubated for 48-72 hours, MAC of 500 colonies /milliliter. The only practical way to determine the total population of bacteria in the water.
 Background bacteria
Bacterial aftergrowth, bacteria reproducing in the system after it has been treated, usually in stagnant water in dead ends, or low flow sections of the water distribution system. The Standard Plate Count determines whether this problem exists.
 Total coliforms
The detection of coliform bacteria in a water sample is a warning of possible contamination. One positive test does not conclusively prove contamination, however, additional tests must be done. The samples may have been contaminated by improper sampling, or laboratory error, therefore repeat sampling must be done.
 Chlorine residual
Is the amount of free chlorine and chlorine compounds in the distribution system available to kill or inactivate any microorganisms present or introduced to the water supply after it leaves the treatment plant. A chlorine residual of 0.2 mg/l measured at the extreme ends of the distribution system is a good indication that chlorine residual is available.
Can be formed when organic materials are present in the water being disinfected with chlorine. Trihalomethanes are suspected carcinogenic compounds. Therefore there is a MAC of .10mg/liter on a 4 quarter rolling average.