Eagle Lake Property Owners' Association
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Eagle Lake Water Quality Status ~ 2016
Results obtained through the Watershed
Watch program of the Rideau Valley
Conservation Authority are tabulated below.
In most years, five points on the lake (sites A,
B, F, G, and the deep point (DP) on the
adjacent map) are sampled for two chemical
parameters and E. coli contamination. In
addition at the deep point, dissolved
oxygen/temperature profiles are obtained in
order to assess lake trout habitat. Such
testing occurs three to four times each season
from May until September.
Copyright © 2015
Eagle Lake Property Owners' Association

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At five year intervals, seven other shoreline
sites are tested (green dots and additional red
dots). These were last done in 2012 and all
results indicated excellent water quality

The fourth and final water sampling for Eagle Lake was completed on September30, 2016 and
forwarded to the Rideau Valley Conservation Authority (RVCA) for analysis purposes. In the case
of the nutrients, total phosphorus (TP) and total Kejldalh nitrogen (TKN), each were measured 12
times at 5 different locations (Table 1). For TP, results were all well below the standard of 20
milligrams/litre with the maximum result 11 micrograms/litre and the average an excellent 6.2
micrograms/litre. Similarly for TKN, with a standard of 500 micrograms/litre, the maximum result
was 460 micrograms/litre with an average of 334 micrograms/litre (Table 1). The overall results of
the four annual samplings are good with no surprises. Eagle Lake water quality continues to be rate
as VERY GOOD.

Results for the 2016 season
for Eagle and Leggat Lakes

Table 1. Lake water chemistry and bacteria count results for 2016
at Eagle and Leggat Lakes.
Tests at Eagle Lake
Number
Average
Maximum
Standards
Total Phosphorus
12
6.2
11
20 mg/litre
Total Nitrogen
12
334
460
500 mg/litre
E. coli
8
2
6
100 CFU/100ml
Calcium
1
14.9
--
20 mg/litre
Tests at Leggat Lake
Number
Average
Maximum
Standards
Total Phosphorus
10
7.6
13.0
20 mg/litre
Total Nitrogen
10
300
410
500 mg/litre
E. coli
6
4
10
100 CFU/100ml
Calcium
1
9.6
--
20 mg/litre
Photograph by Olivia Culver - June 16, 2016
Larry Cameron - Lake Steward
E. coli results were excellent as well at Eagle Lake (Table 1). The standard for E. coli is 100
CFU/100ml (colony-forming units per 100 ml of lake water). The maximum result for Eagle
Lake was 6 CFU/100ml, with the average being 2 CFU/100ml, essentially a negative result.
Calcium was measured at 14.9 mg/litre with the accepted standard being 20mg/litre (Table
1), a result consistent with previous measurements at Eagle Lake.

The results for Leggat Lake were very similar to the above results for Eagle Lake (Table 1).
The calcium level was even lower at Leggat Lake (Table 1), consistent with previous values.
In our review of RVCA’s Watershed Watch Program data for Leggat Lake from 2006 to
2014, we noted that there had been a number of elevated results for phosphorus and E. coli
at two particular sites. So with the assistance of a cottage at the lake, Rick Antonowicz,
additional sampling was done at the two sites in July 2016. Both E. coli and total phosphorus
were well within normal legal at sites of concern and as Table 1 details, there were no
abnormal results in the water samples obtained RVCA during four site visits at Leggat Lake in
2016.
Given the results above it is safe to say that neither bacterial or organic pollution appear to be
a concern in 2016 for both lakes.

In 2015, as part of the Invasive Species Awareness Program sponsored by the Ontario
Federation of Anglers & Hunters, no Zebra Mussel larvae or Spiny Water Flea were
detected at either Hampton’s or Parham Landings. Neither species were found in Leggat
Lake in 2015. Lake water sample were again obtained from the tow boat launch sites in July
2016 to test for both of these invasive species, but the results will not be available until
sometime in 2017.

For an overview of water quality at both Eagle and Leggat Lakes from 2006 to 2014, see the
State of the Lake Report, Update 2015 at the following link on pages 33 and 49,
respectively (http://www.elpoa.net/solr-pdf/solr-2015-part1.pdf).

Beginning this year, annual sampling in May for the Lake Partner Program sponsored by
Ministry of the Environment & Climate Change will now be performed by Joanne and Mike
Clobridge. They will also assist staff from RVCA in collecting water samples for chemical and
bacterial analysis at Eagle Lake.
Contact: devlinbg@hotmail.com