06/12/2024 - Packet
WATER ADVISORY BOARD AGENDA – June 12, 2024
City of Tigard | 8777 SW Burnham St., Tigard, OR 97223 | 503-718-2688 | www.tigard-or.gov | Page 1 of 2
City of Tigard Water Advisory Board Agenda
SERVING TIGARD WATER SERVICE AREA
MEETING DATE: Wednesday, June 12, 2024, 5:30 p.m.-7:00 p.m.
MEETING LOCATION: 10 mil Conference Room – Public Works Admin Bldg.
8777 SW Burnham Street
Public Dial-in Number for listen-only phone bridge (971) 256-0577
When prompted enter Conference ID 13125
1. Call to Order, Roll Call, and Introductions – 1 minute
2. Approval of Minutes – April 24, 2024 – 10 minutes
Action: Motion to approve the April 24, 2024, minutes.
3. Public Comments – 5 minutes
Call for comments from the public.
4. Backflow Program – Water Division – Aaron Beattie & Hung Nguyen – 30 minutes
5. Emergency Management Program – Emergency Services Coordinator – Mike Lueck – 30 minutes
6. Water Supply Update – Brian Rager – 2 minutes
7. Non-Agenda Items – Review of Future Agenda Topics – 5 minutes
Call for non-agenda items from the board.
8. Next Meeting
August 14, 2024
Location: 10 mil PW
Time: 5:30 pm
WATER ADVISORY BOARD AGENDA – June 12, 2024
City of Tigard | 8777 SW Burnham St., Tigard, OR 97223 | 503-718-2688 | www.tigard-or.gov | Page 2 of 2
The City of Tigard tries to make all reasonable modifications to ensure that people with disabilities have an equal
opportunity to participate in all city meetings.
Upon request, the city will do its best to arrange for the following services/equipment:
Assistive listening devices.
Qualified sign language interpreters.
Qualified bilingual interpreters.
Because the city may need to hire outside service providers or arrange for specialized equipment, those requesting
services/equipment should do so as far in advance as possible, but no later than 3 city workdays prior to the meeting.
To make a request, call 503-718-2591 (voice) or 503-684-2772 (TDD - Telecommunications Devices for the Deaf).
9. Adjournment – 2 minutes
Action: Motion for adjournment.
Executive Session
The Water Advisory Board may go into Executive Session. If an Executive Session is called to order, the
appropriate ORS citation will be announced identifying the applicable statute. All discussions are confidential
and those present may disclose nothing from the Session. Representatives of the news media are allowed to
attend Executive Sessions, as provided by ORS 192.660(4), but must not disclose any information discussed.
No Executive Session may be held for the purpose of taking any final action or making any final decision.
Executive Sessions are closed to the public.
Water Advisory Board (WAB) Minutes
SERVING TIGARD WATER SERVICE AREA
Page 1 of 4
MEETING DATE: Wednesday, June 12, 2024, 5:30 p.m.
MEETING LOCATION: 10 mil – Public Works
Members Present:
Commissioner Marie Walkiewicz TWD
Councilor Jeanette Shaw City of Tigard
Commissioner Joshua Drake City of Durham
Commissioner Michael Brewin WAB At-Large Member
Members Absent:
Commissioner Ken Henschel WAB At-Large Member
Members of the Public Present:
City of Tigard Staff Present:
Brian Rager Public Works Director
Shauna Large WAB Coordinator/Recorder
COT Guests:
Mike Lueck Emergency Services Coordinator
Aaron Beattie Water Operations Supervisor
Hung Nguyen Cross Connection Specialist
1.Call to Order, Roll Call, and Introductions
Commissioner Marie Walkiewicz called the meeting to order at 5:30 p.m.
2.Approval of Minutes – April 24, 2024
Commissioner Michael Brewin motioned to approve the April 24, 2024, minutes, Councilor
Jeanette Shaw seconded the motion. The motion passed unanimously, with Commissioners
Marie Walkiewicz, Joshua Drake, Michael Brewin, and Councilor Shaw voting yes.
3.Public Comments
There were no Public Comments.
Amended
Water Advisory Board (WAB) Minutes
SERVING TIGARD WATER SERVICE AREA
Page 2 of 4
4.Backflow – Water Division – Aaron Beattie
Aaron Beattie, Water Operations Supervisor, and City of Tigard employee for 24 years, gave
the presentation. He stated he was not sure when the backflow program started but it was
prior to his starting at the city. He also stated there was a visual inspection program by the
Water Utility staff when he first began working for the City. He was not sure when the
Department of Health started mandating a backflow program, and indicated the plumbing
code mandates the device installation. It is the responsibility of the water jurisdiction to
make sure the devices get tested. The Public Works Water team has some discretion
regarding the type of device that is installed. Hung Nguyen has been the backflow
coordinator since the program started. Mr. Beattie stated typically if a device is installed,
State certified backflow testers test those devices. They are required to mail the Water team
or the water supervisor within 10 days.
The City of Tigard works with the City of Durham, King City, and unincorporated
Washington County. Trying to get information from them can be difficult. The Ops team
does not inspect the installation of the devices, but ensures they are tested by plumbing
inspectors.
The team tracks 9,004 devices within our Tigard Water Service area, and that inventory
grows every year. The Water team must enforce the program and make sure the tests are
completed. The residential compliance is low right now but has improved since 2020, when
backflow compliance fell below 50 percent, and was not compliant with state standards. The
commercial compliance is much higher since the Ops team sends out monthly notices.
The Water team is considering an inspection program such as what Tualatin Valley Water
District (TVWD) offers, whereby TVWD contracts with a select few testing companies and
customers sign up for testing directly through TVWD. This ensures better compliance and
consistent testing methods and reports.
Brian Rager mentioned that this program has been largely a one-person program. Aaron
Beattie has been stepping in during the testing season and sending out letters. Aaron Beattie
and Hung Nguyen share the brunt of the phone calls that are received.
Aaron Beattie wrapped up the presentation by answering questions from the Board.
Water Advisory Board (WAB) Minutes
SERVING TIGARD WATER SERVICE AREA
Page 3 of 4
5. Emergency Management – Emergency Services Coordinator – Mike Lueck
Mike Lueck shared the emergency response plan for the water system. He stated that the city
is fortunate to be a part of Washington County because of the collaborative efforts around
documents like this. Mr. Lueck explained how the cities within the County work together on
the various planning documents.
The Emergency Operations Plan includes the continuity of government “COG” which
describes how overall city operations will continue in an emergency. The “Continuity of
Operations Plan” (or COOP) provides the detail of how each department will continue
specific activities during various scenarios. Mr. Lueck also mentioned the cooperative efforts
among the cities related to the Natural Hazard Mitigation Plan.
Mr. Lueck mentioned that on July 19th the Community Preparedness Fair takes place and
will be combined with the Public Works Day event. He also mentioned that Public Works
conducts one emergency exercise every year, and typically the County is involved. This year
there will be two state exercises. One will be a seismic event which will start on day three or
four after the earthquake has happened. It will be held in the Public Works auditorium.
Brian Rager stated Mike Lueck has done a great job engaging with all departments in the city,
trying to get participation and training so that when these exercises are conducted there are
people assigned to the roles.
Michael Brewin asked if the Board could get a copy of the Water Management Conservation
Plan. Brian Rager stated he will look into getting a copy to the Board.
6. Water Supply Update – Brian Rager
Brian Rager briefly went over the April and May supply updates. This year April was a bit
warmer, and the usage was up more than last year. Councilor Shaw asked why the bill has
increased by $200-$300. Aaron Beattie stated it could be from aging infrastructure leaks. He
also mentioned that Tualatin Valley Water District’s rates have increased quite a bit.
7. Non-Agenda Items – Review of Future Agenda Topics
Water Advisory Board (WAB) Minutes
SERVING TIGARD WATER SERVICE AREA
Page 4 of 4
Aaron Beattie asked the WAB if they would like to tour the water facilities. The Board
agreed they would be interested in taking a tour. Micheal Brewin asked if at some point the
Board could schedule a tour of Reservoir 18 Water Treatment Plant and the Bonita Pump
Station. Shauna Large will set up a doodle pole to schedule the tour of the water facilities.
Mr. Beattie stated he would be happy to facilitate the tour but suggested a separate tour for
the water treatment plant. Jeanette Shaw asked if staff could extend that invitation to a few
of the City Councilors.
8.Next Meeting
August 14, 2024
Location: 10 mil – PW
Time: 5:30 pm
9.Adjournment
At 7:02 p.m., Councilor Shaw moved to adjourn the meeting, and Commissioner Joshua
Drake seconded the motion. The meeting adjourned by unanimous vote of the
commissioners present, with Commissioners Marie Walkiewicz, Joshua Drake, Michael
Brewin, and Councilor Jeanette Shaw voting yes.
CITY OF TIGARD EMERGENCY MANAGEMENT PROGRAMWater Advisory Board Briefing06/12/24Mike LueckEmergency Services Coordinator
PROGRAM GOALCollaborate with County and Regional partners to develop and maintain Tigard’s ability to prepare, respond, recover and mitigate against natural hazards, man-made disasters and major emergencies; to minimize the loss of life, property and protect the environment; ensure continuity of government; facilitate rapid recovery; and educate, empower and supply Tigard citizens with tools required to be a resilient community.
PROGRAM AUTHORITYThe City’s Emergency Management Program was established in accordance with ORS 401.305 and ensures the City’s compliance with applicable state and federal laws and standards. The City’s Emergency Management Code (Chapter 7-74) was revised by Ordinance 2010.
ORGANIZATIONAL STRUCTUREMayorCity ManagerPolice ChiefPublic Works DirectorEmergency Service CoordinatorFinance DirectorCD DirectorHuman Resources DirectorLibrary Director
PROGRAM STAFF - PAIDFull Time Employee:Emergency Service Coordinator (Position was created in 2004 Originally “Program Specialist”)
MAIN PROGRAM ELEMENTSPlansNatural Hazard Mitigation Plan Addendum 2023Emergency Operations Plan 2017Continuity of Government and Operations Plan(s) OGWater Emergency Response Plan 2022Outreach/Public EducationExercises and TrainingEmergency Operations CenterCommunity Emergency Response Team (CERT)Grants
COMMON CHALLENGESCompliance with state and federal requirements.Employees and members of the public, are not always open to receiving preparedness information unless something has previously impacted them or a person close to them.Competing demands for city staff time between daily operational needs and emergency management. Demands for Program staff time for other City priorities.
WATER EMERGENCY RESPONSE PLANEight Chapters5 Year Mandated Review and RevisionIntroduction2 Plans Lake Oswego and TigardMitigationInternal and External StakeholdersAdministration, Procurement and FinanceCertified Train and Exercise SeparateTraining and ExercisingGuiding Document for Real Life EventsConcept of OperationsPost Event Review DocumentedInternal and External CommunicationsSite Visits to Partnership Emergency Response ResourcesSafety Outside ResourceAuthoring and References
SUMMARYWe do the best possible job with resources availableA lot action tasks well – Nothing greatTop Down support and participating support throughout the city is good – Current Turbulence at LeadershipBest Job in the CityDoom and Gloom with respectSkill Set is testedWe get tangible results and ownership by playersFortunate to work in a County that collaborates
QUESTIONS
Water Advisory Board Water Supply Update
April 2024 Update
Tigard Usage
Current
(Apr 24)
Prior Yr
(Apr 23)
Avg Daily Use (MGD)4.67 4.39
Avg Temp 63°59°
Peak Use (MGD)5.36 4.91
Peak Temp 78°88°
Tigard Storage
Stored Water (ASR)331.8 365.5
Days of Supply 185.5 203.5
4.67
Average
4.29
0
2
4
6
8
10
Average Daily Demand (ADD)
April Usage
Average daily water use for the month of April was 4.67
million gallons per day (mgd). Peak daily use was 5.36 mgd.
Last year, average daily water use was 4.39 mgd for the same
time period, with a peak day of 4.91 mgd. The average daily
and peak use for April were typical, just above the historic
averages of 4.29 mgd and 4.96 mgd respectively.
5.36Peak 4.96
0
2
4
6
8
10
Peak Daily Demand (PDD)
The chart above shows Tigard's average daily water use and peak use for the current fiscal year (YTD), as well as
two years prior. This usage is compared to the average and peak air temperatures during that time, displayed as
the shaded areas. The bar chart is displaying precipitation in inches (using left axis). The chart is intended to
display the seasonality of water usage and the close relationship with weather patterns.
0
20
40
60
80
100
120
0
2
4
6
8
10
12
14
Jul 2021Aug 2021Sep 2021Oct 2021Nov 2021Dec 2021Jan 2022Feb 2022Mar 2022Apr 2022May 2022Jun 2022Jul 2022Aug 2022Sep 2022Oct 2022Nov 2022Dec 2022Jan 2023Feb 2023Mar 2023Apr 2023May 2023Jun 2023Jul 2023Aug 2023Sep 2023Oct 2023Nov 2023Dec 2023Jan 2024Feb 2024Mar 2024Apr 2024TemperatureMillion Gallons Per Day (MGD)Tigard Water Usage Compared to Air Temperature and Precipitation
Peak Temperature Average Temperature Precipitation (In)Average Daily Use (MGD)Peak Use (MGD)
Water Advisory Board Water Supply Update
Stored Water (ASR)
Lake Oswego-Tigard Water Treatment Plant & Bonita Pump Station
Data Metrics
Current
(Apr 24)
Prior Yr
(Apr 23)
Chlorine Residual 1.13 1.12
Alkalinity 22.13 21.05
pH 7.93 8.03
Temperature 10.80 8.90
0
50
100
150
200
250
0
50
100
150
200
250
300
350
400
Apr
2021
Jun
2021
Aug
2021
Oct
2021
Dec
2021
Feb
2022
Apr
2022
Jun
2022
Aug
2022
Oct
2022
Dec
2022
Feb
2023
Apr
2023
Jun
2023
Aug
2023
Oct
2023
Dec
2023
Feb
2024
Apr
2024 Days of SupplyStored Water (MG)Stored Water (ASR)
ASR #1 ASR #2 Days of Supply
The chart above shows Tigard's current stored water (ASR levels) as well as 12 months of prior histoy.
The storage levels of ASR #1 and ASR #2 are stacked to show total combined stored water. The days
of supply, based on the amount of stored water, is displayed on the right axis and as the gray line.
0
0.5
1
1.5
2
2.5
3
3.5
4
Chlorine Residual (0.2-4.0ppm boundary)Chlorine Residual: 1.13 ppm
Chlorine is a disinfectant used to
protect the public from virus,
bacteria, and other micro-
organisms. The maximum level
for chlorine in drinking water is 4
ppm and the minimum level
required is 0.2 ppm (indicated by
the yellow shaded area in the
chart above). The average
chlorine residual from July 2021
to current is 1.11 ppm.
Definitions:
LOTWTP: Lake Oswego-Tigard Water Treatment Plant
mg/L: millograms per liter, also expressed as ppm
ppm: parts per million, a measurement of the mass of a
chemical per unit volume of water.
cfs: cubic feet per second, measurement of rate of flow
Water Advisory Board Water Supply Update
0
10
20
30
40
50
60
70 Finished Water Alkalinity (ppm)
4
5
6
7
8
9
10
pH (Raw & Finished)
Clackamas River pH Bonita pH Neutral
0
5
10
15
20
25
Water Temperature C (Raw & Finished)
Clackamas River LOTWTP
Alkalinity: 22.13 ppm
Alkalinity is water's capacity
(buffering) to resist acidic
changes in pH or to neutralize
acid. A normal range for
alkalinity in finished drinking
water is 20-200 mg/L (indicated
by the blue shaded area). The
EPA Secondary Drinking Water
Regulations limit alkalinity only
in terms of total dissolved solids
not to exceed 500ppm.
pH: 7.93
pH is a numerical measure of
the acidity or alkalinity (base) of
a solution, measured on a scale
of 0 to 14. Neutral on the scale
is 7 (indicatd by the gray line in
the chart), below 7 is acidic and
above 7 is alkaline. For drinking
water, slighly base chemistry
(alkaline) provides anti-
corrosion properties to protect
water supply plumbing and
reduces the risks associated
with lead solder and copper
plumbing.
Water Temperature: 10.8C
(51F)
While water temperature can
have a major influence on
biological activity and organic
life in bodies of water, there is
not an EPA standard for the
temperature of finished
drinking water.
As you can see in the chart
above, the temperature of the
finished drinking water
fluctuates in tandem with the
temperature of the source water
(Clackamas River).
Water Advisory Board Water Supply Update
USGS Clackamas River Water Data
The following charts contain U.S. Geological Survey data collected from the Clackamas River. The charts on this
page show a comparison of the current month of data to that same month in the prior years, as well as an average
over those years. On the second page, those charts show the historical trends of each metric from January 2014
to current. Turbidity, a metric not yet defined in this report, is the relative clarity of a liquid. It is an optical
characteristic, measuring the amount of light scattered by material in the water, measured in nephelometric
turbidity units (NTU).
9.2
Average
8.6
0.0
2.0
4.0
6.0
8.0
10.0
12.0
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Temperature for Current Month
3,313
Average
5,221
0
2,000
4,000
6,000
8,000
10,000
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Flow for Current Month
7.8Average
7.5
7.0
7.2
7.4
7.6
7.8
8.0
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
pH for Current Month
1.8
Average
3.0
0.0
2.0
4.0
6.0
8.0
10.0
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Turbidity for Current Month
Water Advisory Board Water Supply Update
0
2
4
6
8
10
12
14
16
18
20
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
Turbidity of Clackamas River (NTUs)
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
pH of Clackamas River
0
2,000
4,000
6,000
8,000
10,000
12,000
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
Discharge (Flow) of Clackamas River (cfs)
0
5
10
15
20
25
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
Temperature of Clackamas River (c)
Water Advisory Board Water Supply Update
May 2024 Update
Tigard Usage
Current
(May 24)
Prior Yr
(May 23)
Avg Daily Use (MGD)6.1 6.83
Avg Temp 69°75°
Peak Use (MGD)7.29 9.21
Peak Temp 91°93°
Tigard Storage
Stored Water (ASR)331.8 364.1
Days of Supply 185.5 202.8
6.1Average
5.44
0
2
4
6
8
10
Average Daily Demand (ADD)
May Usage
Average daily water use for the month of May was 6.1
million gallons per day (mgd). Peak daily use was 7.29 mgd.
Last year, average daily water use was 6.83 mgd for the same
time period, with a peak day of 9.21 mgd. The average daily
and peak use for May were typical, especially in contrast to
the higher usage in 2023, but still above the historic averages
of 5.44 mgd and 7.15 mgd respectively.
7.29Peak 7.15
0
2
4
6
8
10
Peak Daily Demand (PDD)
The chart above shows Tigard's average daily water use and peak use for the current fiscal year (YTD), as well as
two years prior. This usage is compared to the average and peak air temperatures during that time, displayed as
the shaded areas. The bar chart is displaying precipitation in inches (using left axis). The chart is intended to
display the seasonality of water usage and the close relationship with weather patterns.
0
20
40
60
80
100
120
0
2
4
6
8
10
12
14
Jul 2021Aug 2021Sep 2021Oct 2021Nov 2021Dec 2021Jan 2022Feb 2022Mar 2022Apr 2022May 2022Jun 2022Jul 2022Aug 2022Sep 2022Oct 2022Nov 2022Dec 2022Jan 2023Feb 2023Mar 2023Apr 2023May 2023Jun 2023Jul 2023Aug 2023Sep 2023Oct 2023Nov 2023Dec 2023Jan 2024Feb 2024Mar 2024Apr 2024May 2024TemperatureMillion Gallons Per Day (MGD)Tigard Water Usage Compared to Air Temperature and Precipitation
Peak Temperature Average Temperature Precipitation (In)Average Daily Use (MGD)Peak Use (MGD)
Water Advisory Board Water Supply Update
Stored Water (ASR)
Lake Oswego-Tigard Water Treatment Plant & Bonita Pump Station
Data Metrics
Current
(May 24)
Prior Yr
(May 23)
Chlorine Residual 1.13 1.17
Alkalinity 21.54 19.49
pH 7.81 7.79
Temperature 12.42 12.57
0
50
100
150
200
250
0
50
100
150
200
250
300
350
400
Apr
2021
Jun
2021
Aug
2021
Oct
2021
Dec
2021
Feb
2022
Apr
2022
Jun
2022
Aug
2022
Oct
2022
Dec
2022
Feb
2023
Apr
2023
Jun
2023
Aug
2023
Oct
2023
Dec
2023
Feb
2024
Apr
2024 Days of SupplyStored Water (MG)Stored Water (ASR)
ASR #1 ASR #2 Days of Supply
The chart above shows Tigard's current stored water (ASR levels) as well as 12 months of prior histoy.
The storage levels of ASR #1 and ASR #2 are stacked to show total combined stored water. The days
of supply, based on the amount of stored water, is displayed on the right axis and as the gray line.
0
0.5
1
1.5
2
2.5
3
3.5
4
Chlorine Residual (0.2-4.0ppm boundary)Chlorine Residual: 1.13 ppm
Chlorine is a disinfectant used to
protect the public from virus,
bacteria, and other micro-
organisms. The maximum level
for chlorine in drinking water is 4
ppm and the minimum level
required is 0.2 ppm (indicated by
the yellow shaded area in the
chart above). The average
chlorine residual from July 2021
to current is 1.11 ppm.
Definitions:
LOTWTP: Lake Oswego-Tigard Water Treatment Plant
mg/L: millograms per liter, also expressed as ppm
ppm: parts per million, a measurement of the mass of a
chemical per unit volume of water.
cfs: cubic feet per second, measurement of rate of flow
Water Advisory Board Water Supply Update
0
10
20
30
40
50
60
70 Finished Water Alkalinity (ppm)
4
5
6
7
8
9
10
pH (Raw & Finished)
Clackamas River pH Bonita pH Neutral
0
5
10
15
20
25
Water Temperature C (Raw & Finished)
Clackamas River LOTWTP
Alkalinity: 21.54 ppm
Alkalinity is water's capacity
(buffering) to resist acidic
changes in pH or to neutralize
acid. A normal range for
alkalinity in finished drinking
water is 20-200 mg/L (indicated
by the blue shaded area). The
EPA Secondary Drinking Water
Regulations limit alkalinity only
in terms of total dissolved solids
not to exceed 500ppm.
pH: 7.81
pH is a numerical measure of
the acidity or alkalinity (base) of
a solution, measured on a scale
of 0 to 14. Neutral on the scale
is 7 (indicatd by the gray line in
the chart), below 7 is acidic and
above 7 is alkaline. For drinking
water, slighly base chemistry
(alkaline) provides anti-
corrosion properties to protect
water supply plumbing and
reduces the risks associated
with lead solder and copper
plumbing.
Water Temperature: 12.4C
(54F)
While water temperature can
have a major influence on
biological activity and organic
life in bodies of water, there is
not an EPA standard for the
temperature of finished
drinking water.
As you can see in the chart
above, the temperature of the
finished drinking water
fluctuates in tandem with the
temperature of the source water
(Clackamas River).
Water Advisory Board Water Supply Update
USGS Clackamas River Water Data
The following charts contain U.S. Geological Survey data collected from the Clackamas River. The charts on this
page show a comparison of the current month of data to that same month in the prior years, as well as an average
over those years. On the second page, those charts show the historical trends of each metric from January 2014
to current. Turbidity, a metric not yet defined in this report, is the relative clarity of a liquid. It is an optical
characteristic, measuring the amount of light scattered by material in the water, measured in nephelometric
turbidity units (NTU).
11.0
Average
11.8
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Temperature for Current Month
4,269Average
3,707
0
2,000
4,000
6,000
8,000
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Flow for Current Month
7.6
Average
7.7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
8.0
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
pH for Current Month
2.4Average
1.7
0.0
1.0
2.0
3.0
4.0
5.0
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Turbidity for Current Month
Water Advisory Board Water Supply Update
0
2
4
6
8
10
12
14
16
18
20
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
Turbidity of Clackamas River (NTUs)
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
pH of Clackamas River
0
2,000
4,000
6,000
8,000
10,000
12,000
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
Discharge (Flow) of Clackamas River (cfs)
0
5
10
15
20
25
Jan
2014
Jul
2014
Jan
2015
Jul
2015
Jan
2016
Jul
2016
Jan
2017
Jul
2017
Jan
2018
Jul
2018
Jan
2019
Jul
2019
Jan
2020
Jul
2020
Jan
2021
Jul
2021
Jan
2022
Jul
2022
Jan
2023
Jul
2023
Jan
2024
Temperature of Clackamas River (c)