see 2011 Report
Report on 4 Mile Lake Water Quality
by: Chris Ostrovski [Dec 2005]
The monitoring of recreational water quality at public bathing beaches is a mandated program under the authority of the Mandatory Health Programs and Services Guidelines as authorized by the Health Protection and Promotion Act.
All such public beaches are monitored for bacteriological quality on a weekly basis over the bathing season (5 samples each week/minimum 9x per season) by Environmental Health Officers of the Haliburton Kawartha Pine Ridge District Health Unit.
Contamination sources are monitored over the bathing season to
determine and assess potential pollution sources and their potential
impact on the suitability of beach water for public bathing purposes.
Contamination sources include but are not limited to the following:
Laboratory results are processed at the Public Health Laboratory in Peterborough and enumerated for E. coli bacteria. E. coli are bacteria found in the gastro-intestinal tract of warm blooded animals including humans. They indicate recent faecal pollution which potentially is a contaminate of the beach environment. Faecal matter, particularly that which is human in nature has the potential of carrying disease causing micro-organisms. E. coli bacteria is an indicator of faecal contamination. With such increases in the levels of E.coli in bathing beach water(>100 E. coli/100mL) comes an increased risk to bathers of acquiring infections of the GI tract, eye, skin and ears.
Environmental Health officers will consider posting a public bathing beach when the geometric mean taken from 5 samples is >100 E. coli per 100mL.
Four Mile Lake Beach is one such public bathing beach which is monitored regularly over the bather season. Historically this beach has yielded satisfactory bacteriological results with ONE beach posting over these two years. Below are the results from these bathing beaches for the years 2004 and 2005. The public bathing beach was posted once in 2005, in part as a result of heavy rainfall 24 hrs prior to sampling. See Table 1.1 below.
Table 1.1 Laboratory Results of Bacteriological Water Quality taken
Sampling Date Geometric Mean
Further information related to weekly beach postings can be accessed through the Health Unit's website at www.hkpr.on.ca.
The subsequent results for the balance of the summer indicate that FML has consistantly good water quality well below the 100 mark.
FMLA tried to obtain comparative data from other local lakes to show that FML has consistantly high quality conditions in the lake. However, these data were not made available by "press time".
[Original text prepared by: Haliburton Kawartha Pine Ridge District
|by: C. Ostrovski|