Litter surveys on the American River and Clear Lake

1. H
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Litter survey results for Rancho Cordova & Clear Lake
November 2015 - May 2016

2. The project
Hammerdirt removes and inventories the
visible pollutants on the shoreline of Clear
Lake and the Cordova Creek spillway
The data collected can be used to evaluate
current litter mitigation strategies. De-
signed and inspired by the citizen science
method, the data is open and free to use.
Data
The data for each survey location is avail-
able for download from our website, fol-
low the “Kobotoolbox” link for the location
in question. Once you have accessed the
“toolbox” you can download the data, view
the results on a map or view the results
one by one, images are included. The raw
data is added to our repository on GitHub
monthly.
https://github.com/hammerdirt/beachLit-
terSurveys
Association
All the labor and resources for this project
are furnished by hammerdirt association.
We are always looking for serious, dedi-
cated individuals that would like to fund,
initiate or participate in projects of this
type. For more information :
www.hammerdirt.ch
Funding
This project is unfunded, all costs for
the project have been assumed by Gary
Hare and Steven Marler, the founders of
hammerdirt California. We would like to
expand our operations to include more
locations and more surveys. Individuals or
groups interested in funding this project
or an expanded version should contact us
directly.
Somebody needs to do this
Contents
The project 2
Key figures 3
Admin and revenue 4
Rancho Cordova 5
Clear Lake 6
Guest Volunteer 7
Images
• Cover photo : Austin Park beach, Clear
Lake California
• Facing page : Gary Hare cleaning up at
Cordova Creek
• Page Three : Marler family on duty at
Austin Park Beach
• Back cover : Conluence Cordova Creek
and American River

3. 3
Key figures Nov 2015 - May 2016
7K
pieces removed interventions
35
locations
2
Type of debris removed
Top six debris classifications
Plastic
Metal
Glass
Paper
Other
80% - 5’620pcs
7%
6%
3%
3%
Styrofoam
Cigarettes
Shopping bags
Candy wrappers
Plastic pieces
Paper
15% - 1’078pcs
13% - 931pcs
11% - 805pcs
5%
4%
4%
Get the data on GitHub
The remaining 48% is spread out among 91 different categories

4. 4
Labor and administration
Partners
Revenue
105
Collecting
debris, and
data entry
hours
0
Comercial
partners
0
Grants,
subsidies or
donations
0
Public
partners
35
Blog and
social
media up
dates
hours
12
Data
wrangling
hours
24
Reports
hours
Expenses
$525
Expenses
not
inlcuding
labor

5. 5
Individual results: Cordova Creek
5’679 pieces of trash were
removed in 27 operations
from the confluence of
Cordova Creek and the
American River
55% of the items found can
be attributed to 6 categories :
1. Styrofoam
2. Candy Wrappers
3. Cigarette butts
4. Plastic pieces
5. Plastic bags
6. Shopping bags
The rest of the litter found
(45%) is spread out among 87
other categories.
Download
Data
https://kc.kobotoolbox.
org/hammerdirt/forms/
Cordova_Creek_II
0
100
200
300
400
500
600
0
100
200
300
400
500
600
2015-12-08
2015-11-28
2016-01-13
2016-01-20
2016-02-03
2016-02-17
2016-03-02
2016-03-16
2016-03-23
2016-04-06
2016-04-20
2016-05-04
2016-05-11
2016-05-25
Movingaverage
Totalpiecescollectedperday
Daily totals and average
Cordova Creek - Rancho Cordova
November 2015 - May 2016
Daily Total Average
Styrofoam
18%
Candy wrappers
13%
Cigarette butts
11%
Plastic pieces
5%
Plastic bags
4%
Shopping bags
4%
All else
45%
Top six categoriesof trash found
Cordova Creek-Rancho Cordova
November 2015 - May 2016

6. 6
Individual results: Clear Lake
1’328 pieces of trash were
removed in eight operations
from Austin Park in Clear
Lake.
60% of the items found can be
attributed to 6 categories :
1. Cigarettes
2. Shopping bags
3. Bottles/Broken glass
4. Paper fragments
5. Styrofoam > 24”
6. Styrofoam < 24”
The rest of the litter found
(40%) is spread out among 69
other categories.
Download
Data
https://kc.kobotoolbox.
org/hammerdirt/
forms/clear_lake
0
100
200
300
400
500
600
0
100
200
300
400
500
600
2015-11-29
2015-11-22
2015-12-26
2016-01-10
2016-01-24
2016-02-28
2016-03-27
2016-05-01
Movingaverage
Totalpiecescollectedperday
Daily totals and average
Clear Lake - Austin Park
November 2015 - May 2016
Daily Totals Average
Cigarette butts
22%
Shopping bags
11%
Bottles pieces
9%
Paper
Fragements
8%Styrofoam >
50cm
5%
Styrofoam <
50cm
5%
All else
40%
Top six categoriesof trash found
Clear Lake - Austin Park
November 2015 - May 2016

7. 7
Our guest volunteer :
Tony Ersimann
getting busy cleaning
up Cordova Creek
with Gary Hare
Thanks Tony !

8. 8
We fight against the pollution
because water is our
greatest natural resource.
www.plagespropres.ch
info@plagespropres.ch