Lake Water Quality 2006 Report - Lakefield Herald

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Below are the phosphorus contributions recorded for these plants. The numbersrepresent a 3-year average of the last 3 years of data:Lindsay: 1.6 kg/dayPort Perry: 0.8 kg/dayFenelon Falls: 0.17 kg/dayBobcaygeon: 0.5 kg/dayThe total for the 4 plants is thus about 3.1 kg/day. This is roughly equivalent to theeffect that we might expect were 1000 cottages discharging their sewage directly tothe lake, and so, while a great deal of phosphorus is being removed at the sewagetreatment plants, a great deal is still being discharged.The Lindsay plant has shown a steady increase in phosphorus discharges, save for abig increase in 2004 followed by a small reduction in 2005. Since 2001, phosphorusdischarges have increased by 75%. Overall, given the size of the town served, thedischarges are not excessive, although the increasing amounts are cause for concern.Lindsay is experiencing growth pressures; we should be very concerned about growthwithout further improvements in phosphorus removal.Port Perry uses lagoons discharging to the Nonquon River, which drains to LakeScugog. These are seasonal-discharge lagoons. However, the flow rate through LakeScugog is far less than in the other Kawartha Lakes, and therefore the seasonalityaspect has less benefit. Port Perry’s discharges have increased 62% since 2002. Foullookingand -smelling discharges to the Nonquon River have been observed. Given thevery poor water quality seen in western Lake Scugog, it is likely that the Nonquonlagoons are a significant source of phosphorus pollution, and require upgrading.Sewage lagoons are an archaic method of sewage treatment and a modern plant alongwith seasonal holding facilities would be a far better treatment method.Bobcaygeon has, conversely, seen no increase in phosphorus discharges over the past5 years, and in fact, save for 2003, it has seen a slight reduction. 2005 values were22% lower than in 2000. However, given the small population served, the dischargesare higher than desirable. The effect of the higher discharges of phosphorus wasevident in 2003, when levels matched those in Port Perry. In that summer, pea-soupconditions were observed stretching across Pigeon Lake from Bobcaygeon to BigIsland, and algae coated the rocks on the shores. Water in Sturgeon Lake upstreamexhibited far better quality. It is hoped that we will continue to see further annual32
eductions in phosphorus discharges from this plant, and if not, it may be overdue formajor upgrading.Fenelon Falls has similarly exhibited a downward trend in phosphorus discharges,2005 being down 37% from 2000. It is hoped that this trend continues.Sewage treatment plant discharges are likely the most controllable large source ofphosphorus to our lakes. KLSA should continue to monitor the phosphorus dischargesfrom the STPs and press for improvements when and where warranted.Upper Stoney Lake33
Page 1: Kawartha Lake Stewards AssociationW
Page 4 and 5: Table of ContentsPresident’s Mess
Page 6 and 7: President’s Message2007 will be t
Page 8 and 9: species-at-risk and shoreline and i
Page 10: There are 3 different “phosphorus
Page 13 and 14: Map of the Kawartha Lakes 2006 Test
Page 15 and 16: subsequently deposited formations n
Page 17 and 18: These problems were solved with the
Page 19 and 20: Burleigh fallsThe cataracts effecti
Page 21 and 22: to estimate how much phosphorus is
Page 23 and 24: levels of these two inflows. Big Ba
Page 25 and 26: Low Phosphorus Lakes35.0030.0025.00
Page 27 and 28: The high flow/low phosphorus theory
Page 29 and 30: Phosphorus Levels over 5 Years (eac
Page 31 and 32: Flow vs Phosphorus, 200530030Flow,
Page 33: Many other sources of phosphorus to
Page 37 and 38: Ontario’s Natural Resources and V
Page 39 and 40: the Base Flow Index (BFI) and perce
Page 41 and 42: systems and animal feces (beef, pou
Page 43 and 44: ANOVA analysis as no suitable data
Page 45 and 46: 3530Phosphorus (µg/l)252015105a ab
Page 47 and 48: How Much Algae Sticks to Macrophyte
Page 49 and 50: sites for both lakes (Pigeon Lake S
Page 51 and 52: The results from our initial survey
Page 53 and 54: Are our lakes at risk of switching
Page 55 and 56: Generally, then, the water in the K
Page 59 and 60: Appendix A:KLSA Mission Statement,
Page 61 and 62: Appendix B: Financial PartnersParks
Page 63: Date Expenses04-Jan-06 Bank Fees 3.
Page 68 and 69: At your request, subject to applica
Page 70 and 71: Lake-by-Lake E.coli ResultsTo put t
Page 72 and 73: To put the results in perspective:
Page 84 and 85:
LAKE NAME Site Description DateSecc
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Appendix G: GlossaryAquatic plants
Page 92 and 93:
plants. In the Kawartha Lakes area,
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