Monthly Water Quality Summary for February 2010
Regional District of North Okanagan – Greater Vernon Water
The following is the water quality summary for the month of February 2010,
supplied by Regional District of North Okanagan (RDNO) / Greater Vernon Water
(GVW).
1.0 Treated Water Quality Testing
Table 1: Distribution Bacterial Results
Bacterial Statistics
# Bacterial
samples sent to
Caro
Environmental
Lab
# Bacterial
samples
analyzed at
GVW Lab
# samples
positive for
Total Coliform
# samples
positive for
E.coli
Antwerp
Springs/Kalamalka
5
4
0
0
Kalamalka
34
31
0
0
Upland /Duteau
33
33
0
0
Outback
5
1
0
0
Total
77
69
0
0
Distribution System
Name
1
Bacterial Results
Table 2: Distribution Disinfection Results
Chlorine Statistics
Distribution
System Name
Antwerp
Springs/Kalamalka
Kalamalka
Upland/Duteau
Outback
# Tests
taken
throughout
month
#
#
Tests Sites
7
59
43
5
4
21
23
1
* See Action Taken Section
Chlorine Results in mg/L
Free
Total
Minimum
0.25
0.44
Maximum
1.18
1.32
SE
0.11
0.11
Minimum
0.17
0.29
Maximum
1.90
2.16
SE
0.04
0.05
Minimum
0.10
0.29
Maximum
5.19
6.6
SE
0.12
0.14
Minimum
0.68
0.91
Maximum
1.57
1.81
0.17
0.17
SE
†
SE = Standard Error of the data
Comments
0 samples had
free chlorine
residuals below
0.20 mg/L
1 sample had a
free chlorine
residual below
0.20 mg/L
1 sample at 1
sites had a free
chlorine residual
below 0.20 mg/L
0 samples had
free chlorine
residual below
0.20 mg/L
Actions Taken
At sites with low chlorine (less than 0.20 mg/L free chlorine) duplicate bacterial
samples are taken to Greater Vernon Water lab. Further to this, flushing may
take place in problem areas of the system and regular flushing is carried out
when possible. Customers are notified if the flushing and increased chlorine
levels do not improve the water quality.
2
Table 3 summarizes some of the parameters that are collected at quality
assurance (QA) sites within the distribution system on the third week of each
month. Parameter averages are reported at sites with more than one value.
Table 3: Distribution Water Quality Results for February 2010
Average
Temperature
o
C
Average
pH
Average
Conductivity
uS/cm
Iron
mg/L
Sulphate
mg/L
TOC
mg/L
Foothills
Pumpstation
6.3
8.0
471
0.02
65
7.8
PRV #2
3.4
6.2
59
0.25
1
19.4
Ponderosa
5.9
8.1
427
0.02
66
8.6
Site Name
ND = Non Detectable
Table 4 summarizes some parameters that are collected at QA sites within the
distribution system on the third week of March, June, September and December.
Table 4: Quarterly Distribution Water Quality Results for March 2010
True Colour
Units
Hardness mg/L
as CaC03
Alkalinity
mg/L as CaC03
Foothills Pumpstation
1†
171
152
PRV #2
10†
*25
222
Ponderosa
0†
163
144
Site Name
*November †February
3
2.0 Operational Overview
City of Vernon (excerpt from report by Terry Krause City of Vernon)
February 2010
TOTAL INFLOWS
Station Meters
m³
Mission Hill WTP
Head Gates
King Edward
Well #1
Well#2
Outback
Megaliters
497.6
212.1
0.0
0.0
0.0
0.5
710.2
494300
218000
0
0
0
614
712914
Total
STORAGE LEVELS
Aberdeen Lake (18’8”)
Haddo Lake (19’6”)
Grizzly Lake (30’4”)
King Edward Lake (20’)
Goose Lake (18’5”)
Kalamalka Lake
2-Mar
2-Mar
2-Mar
Dec 1 09
2-Mar
1-Mar
Current Levels
Last
Read
3.75
12.1
13.71
6.8
14.6
5.224
3.17
14.25
13.27
6.8
14
5.28
Level
Change
0.58
-2.15
0.44
0
0.6
-0.056
2-Mar
Date Collected (D/M/Y)
SNOW SURVEY
Snow Water
Depth Equivilent
(cm)
320
69
32
6.9
Total
Average
2/3/2010
Date Collected (D/M/Y)
Snow Course Number
Snow Course Name
Elevation-Meters
1F01A
Aberdeen Lake
1310 M
4
OPERATIONAL
HIGHLIGHTS
Last Calibration Date on Turbidity
Meters :
Headgates
Westkal PS
Outback BS
Goose Lake
MHWTP
Allenby
King Ed
Jan 21 2010
Jan 21 2010
Jan 21 2010
Jan 21 2010
Jan 21 2010
Jan 25 2010
Jan 21 2010
COMMENTS
Well 2 turned off until further notice due to the problems
associated with Antwerp
District of Coldstream (excerpt from report by Dave Acton District of
Coldstream) February 2010
Coldstream Creek Pumphouse
11.5 Megaliters Pumped
190 liters of 12% Hypo used
Giardia Performance Monitoring for the Duteau Creek Source
For February 2010 the Duteau Creek system attained a 3-log (99.9%) for Giardia
cyst inactivation on all of the days that were monitored. Table 3 displays the
information used to calculate this.
5
Table 5: Giardia Performance Monitoring Calculations for February 2010
DATE
March
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Headgates
Ph
6.7
6.7
6.7
6.7
6.7
6.6
6.6
6.7
6.8
6.9
6.8
6.86
6.86
6.85
6.7
6.83
6.8
6.8
6.7
6.88
6.89
6.7
6.7
6.7
6.8
6.7
Headgates
temp
(lowest)
1.7
1.3
1.3
1.4
1.3
1.2
1.2
1.3
1.2
1.2
1.2
1.5
1.6
1.5
1.2
1.3
1.2
1.1
1.2
1.2
0.8
0.4
0.4
0.3
0.4
0.7
Headgates
flow
PRV#1
CT
CT
1200
1650
2000
1740
1440
1550
1600
1830
1670
1650
1475
1930
1890
1830
1880
1580
1830
1600
1590
1240
1600
1400
1040
1160
1280
1320
residual
1.34
1.26
1.37
1.12
1.07
1.02
1.07
1.07
0.97
0.96
0.96
1.06
0.96
1.21
1.11
1.06
1.11
1.12
1.11
0.96
0.96
0.86
0.81
0.83
0.91
1.01
acheived
3153.3
2156.4
1934.3
1817.6
2098.3
1858.3
1888.4
1651.1
1640.2
1643.0
1837.9
1550.9
1434.3
1867.1
1667.3
1894.5
1712.8
1976.7
1971.4
2186.2
1694.3
1734.6
2199.3
2020.5
2007.6
2160.7
Required
185.9
189.3
191.7
184.7
184.8
177.4
178.7
184.8
190.8
198.1
190.5
193.9
189.7
197.0
187.1
194.3
194.7
196.3
187.1
196.6
202.9
190.3
188.6
190.6
199.7
190.9
Cl
CTa/CTr req'd
16.97
11.39
10.09
9.84
11.36
10.48
10.57
8.94
8.60
8.29
9.65
8.00
7.56
9.48
8.91
9.75
8.80
10.07
10.54
11.12
8.35
9.11
11.66
10.60
10.05
11.32
6
0.08
0.11
0.14
0.11
0.09
0.10
0.10
0.12
0.11
0.12
0.10
0.13
0.13
0.13
0.12
0.11
0.13
0.11
0.11
0.09
0.11
0.09
0.07
0.08
0.09
0.09
%
Achieved
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
100.00
TOT.
VOL.
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
2823846
TIME
(mins)
2353.2
1711.4
1411.9
1622.9
1961.0
1821.8
1764.9
1543.1
1690.9
1711.4
1914.5
1463.1
1494.1
1543.1
1502.0
1787.2
1543.1
1764.9
1776.0
2277.3
1764.9
2017.0
2715.2
2434.4
2206.1
2139.3
Headgates
Residual
4.21
4.54
4.10
4.00
3.95
3.69
3.99
3.84
3.86
3.76
3.96
3.94
3.7
4.06
3.94
3.52
3.94
3.68
4.01
3.77
3.91
3.88
4.00
3.95
3.75
3.83
Turb @
Headgates
Time
0.790
0.800
0.780
0.730
0.710
0.820
0.730
0.770
0.730
0.650
0.680
0.730
0.720
0.680
0.750
0.850
0.980
0.760
0.730
0.870
0.830
1.010
0.990
1.020
0.810
0.740
Hours
39.2
28.5
23.5
27.0
32.7
30.4
29.4
25.7
28.2
28.5
31.9
24.4
24.9
25.7
25.0
29.8
25.7
29.4
29.6
38.0
29.4
33.6
45.3
40.6
36.8
35.7
3.0 Source Water Quality Testing
Weekly and monthly routine sampling was completed for all sources in use for February.




Kalamalka Lake North Intake (West Kal Road Pump Station)
Kalamalka Lake East Intake (Coldstream Creek Road Pump house)
Headgates Chlorine building (Duteau Creek intake)
Okanagan Lake (for Outback Resort)
Table 6 summarizes some of the parameters that are collected at the sources on the third week
of each month. Parameter averages are reported at sites with more than one value.
Table 6: Source Water Quality Results for February 2010
Average
Average
Average
Iron
Site Name
Temperature
Conductivity
pH
mg/L
o
C
uS/cm
North
Kalamalka
5.0
7.6
401
0.03
Intake
East
Kalamalka
5.5
7.7
415
0.02
Intake
Headgates Duteau Creek
1.5
6.6
47
0.24
Intake
OkanaganOutback Lake
5.9
7.2
286
0.04
Station
TDP = Total Dissolved Phosphorous
TOC = Total Organic Carbon
TKN = Total Kjeldahl Nitrogen
ND = Non Detection
7
TDP
mg/L
Sulphate
mg/L
TOC
mg/L
TKN
mg/L
<0.01
64
7.4
0.37
<0.01
65
8.7
0.3
0.01
<7
18.5
0.18
0.01
41
9
0.19
Table 7 summarizes some parameters that are collected at the sources on the third week of
March, June, September and December.
Table 7: Quarterly Source Water Quality Results for March 2010
True Colour
Units
Hardness mg/L as
CaC03
Alkalinity
mg/L as CaC03
North Kalamalka Intake
4†
174
150
East Kalamalka Intake
7†
206
183
Headgates - Duteau
Creek Intake
33†
25
21
Okanagan Outback Lake
Station
8†
128
116
Site Name
† February
Turbidity
In response to IHA’s directive to educate and notify RDNO-GVW customers on Turbidity a daily
average is reported to a turbidity index on the GVW website, found by clicking on Greater Water
Utility under Services on the RDNO website www.rdno.ca. Table 8 is a statistical summary of
the data.
Currently, a 24 hour average, above 1.0 NTU will trigger a Water Quality Advisory (WQA) and a
24 hour average above 5.0 NTU will trigger a Boil Water Notice (BWN). Due to the addition of
Ultraviolet disinfection at the Mission Hill Treatment Plant for the North Kalamalka Intake a 24
hour average above 3.5 NTU will trigger a WQA and a 24 hour average above 5.0 NTU will
trigger a BWN.
Table 8: Source Water Turbidity Statistics for Turbidity February 2010
# of days
average
turbidity
read
# of days
turbidity
>1 NTU‡‡
% of days
when turbidity
was above
1 NTU
# of days
turbidity
> 5 NTU
% of days
when turbidity
was above
5 NTU
North Kalamalka
Intake
30
0
0%
0
0%
East Kalamalka
Intake
30
0
0%
0
0%
Headgates –
Duteau Creek
Intake
30
0
0%
0
0%
Source Name
8
Chart 1 displays the 24 hour average turbidity readings analyzed via online turbidity meters at
Duteau Creek Intake, North Kal Intake and East Kal Intake. The data is captured by SCADA
(Supervisory Control and Data Acquisition).
East Intake on Kal Lake
Duteau Creek Intake
North Intake on Kal Lake
10
Turbidity (ntu)
8
6
4
2
27-Feb-10
25-Feb-10
23-Feb-10
21-Feb-10
19-Feb-10
17-Feb-10
15-Feb-10
13-Feb-10
11-Feb-10
9-Feb-10
7-Feb-10
5-Feb-10
3-Feb-10
1-Feb-10
0
Chart 1: Daily 24- hr average turbidity readings for Duteau Creek, North Kal Intake and
East Kal Intake.
UV (Ultraviolet) Treatment
Ultra-violet (UV) treatment is the disinfection process which deactivates harmful microbiological
substances using a UV light source. UV systems alone are neither intended to treat water that is
visually contaminated nor intended to convert wastewater to safe, microbiologically potable
water (CMHC).
Greater Vernon Water uses UV disinfection at Mission Hill Treatment Plant which treats water
from the North Intake on Kalamalka Lake. In addition, UV disinfection is utilized on the
Okanagan Lake water intake which services the Outback on Okanagan Lake. The chart below
displays the Ultra Violet Transmissivity (UVT) which is a measure of the ability of the UV light at
254 nm (the germicidal wavelength) to pass through the water column as a percentage. For
example 0% UVT would mean no light would pass through and 100% UVT would mean 100% of
the light would pass through the water column. In order for Ultraviolet treatment to be effective
for Greater Vernon Water the readings should be above 87%.
9
Chart 2 displays the UV Transmittance for Duteau Creek, North Kal Intake and the Outback. UV
transmittance is analyzed monthly for the Outback and weekly for North Kal Intake. UV
transmittance is analyzed weekly for Duteau Creek to gather data for future treatment
applications. UV disinfection is not being applied at this time to Duteau Creek.
Chart 2: Caro Environmental Ultraviolet Transmittance for Duteau Creek, North Kal Intake
and the Outback
Chart 3 displays UV transmittance which are analyzed weekly in the GVW lab for Duteau Creek
and Kalamalka Lake sources.
Chart 3: GVW Lab Ultraviolet Transmittance for Duteau Creek and North Kal Intake
10
Chart 4 displays the Dissolved Organic Carbon values which are analyzed weekly at the Caro
Environmental Lab for Duteau Creek.
Chart 4: Caro Environmental Dissolved Organic Carbon for Duteau Creek
Upland Watershed Monitoring
As a part of GVW’s commitment to water quality, a Watershed Assessment for the Duteau Creek
Community Watershed has been completed. The final draft of this document was reviewed by
the technical steering committee. A Protection Plan is now being completed for the Duteau
Creek Community Watershed.
Water storage is monitored weekly during the year through snow pack monitoring and lake level
monitoring. Chart 5 displays the lake level readings of the upland lakes, which include Grizzly,
Haddo and Aberdeen. Currently the water storage is 47% below average. Chart 6 displays the
historic snow pack readings which are taken from February to May.
11
2010
Average
25000
March 30 Average
9648 ML
Volume (Megalitres)
20000
15000
10000
5000
March 30, 2010
4612 ML
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Chart 5: Water Storage of the Upland Lakes, Grizzly, Haddo and Aberdeen
140
124
% of Average Snow Water Equivalent
from February-May
120
114
106
100
92
80
90
67
60
48
40
20
0
2004
2005
2006
2007
Year
Chart 6: Upland Snow Pack Readings
12
2008
2009
2010
3.0 Conclusion
Additional information on water quality can be found through the water quality section of our
website, www.rdno.ca. Also, GVW can be contacted at (250) 550-3702.
13