Download - Water Collection and Sanitation
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KATIE ENGDAYTON PICKERING
JESSICA RICCIORURY VELASQUEZ
AND IAN BUCK
Water Collection and Sanitation
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Our Group
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Problem Statement
The conditions of the water in San Pablo are for the most part unknown
There is an abundance of rainwater in the wet season and a lack of water for agricultural purposes in the dry season
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Project Challenges
Our proposed problem was not realized upon arriving in San Pablo After observing the conditions in San Pablo, we
discovered that a Slow Sand Filter was not the most appropriate technology for the people here
The materials we needed were not always available
Research and communication were difficult
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Water Collection
Gutter system on Casa Guateca
Rainwater collection tank to be used in the kitchen area
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Gutter System and Tank
Designed wooden crutches to hold the gutters
Connected the downspout to the collection tank using PVC
Fixed leaks and erosion points caused by system
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Water Sanitation
Water sample tests from each source
Water sample tests from house drinking and tap water
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Water Testing from Sources
Hiked to the four sources in San Pablo to take water samples
Tested samples taken with test strips and turbid meter
Source Sector Served
1 1 and 3
2 2
3 4
4 5
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Water Sample Multi Meter Test Data- Sources
Site Location Total Dissolved Solids (mg/L)
Dissolved Oxygen(mg/L)
Turbidity(NTU)
EPA Standards
US National 500 5 (aquatic life)
1 (95% of samples need to be below 0.3 NTU)
Source 1 Sector 1 and 3
42.88 4.55 0.0
Source 2 Sector 5 32.64 4.4 0.0
Source 3 Sector 2 49.92 4.61 0.0
Source 4 Sector 4 28.8 4.41 0.0
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Water Sample Coliform Test Data- Sources
Site Location Fecal Coliforms(col/100ml)
Non-Fecal Coliforms(col/100ml)
Total Coliform(col/100ml)s
Aeromonas(col/100ml)
Salmonella(col/100ml)
EPA Standards
US National
Absent 5% Positive
5% Positive
Source 1 Sector 1 and 3
0/0 20/40 20/40 20/60 0/0
Source 2 Sector 5 0/0 0/0 0/0 20/260 0/100
Source 3 Sector 2 0/0 0/0 0/0 0/0 0/0
Source 4 Sector 4 0/0 240/100 240/100 0/3200 0/2400
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Water Testing from Home Sources
Took water samples from each group’s house in San Pablo
Tested water samples with test strips and turbid meter
House Sector
Casa Julio 1
Casa Mimi 3
Casa Yoni 3
Casa Henry 4
Casa Miguel 4
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Water Sample Test Data- Houses
Site Location Total Dissolved Solids (mg/L)
Dissolved Oxygen(mg/L)
pH Turbidity(NTU)
EPA Standards
US National 500 5 (aquatic life) 6.5-8.5 1 (95% of samples need to be below 0.3 NTU)
Casa de Ian Sac, CA 101.12 5.17 6.63 0.0
Casa Mimi (Tap)
Sector 3 37.12 5.79 5.00 0.0
Casa Mimi (Drinking)
Sector 3 37.76 4.72 6.32 0.0
Casa Yoni (Drinking)
Sector 3 39.04 3.05 5.64 0.0
Casa Julio (Tap)
Sector 1 42.88 5.80 5.29 0.0
Casa Julio (Drinking)
Sector 1 43.52 3.69 5.71 0.0
Casa Henry (Drinking)
Sector 4 42.88 4.5 5.42 0.0
Casa Miguel (Drinking)
Sector 4 40.32 4.61 5.45 0.0
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Water Sample Coliform Test Data- Houses
Site Location Fecal Coliforms(col/100ml)(48/72 hr)
Non-Fecal Coliforms(col/100ml)(48/72 hr)
Total Coliform(col/100ml)(48/72 hr)
Aeromonas(col/100ml)(48/72 hr)
Salmonella(col/100ml)(48/72 hr)
EPA Standards
US National
Absent 5% Positive
5% Positive
Casa Mimi (Tap)
Sector 3 0/0 0/20 0/20 1000/2100 0/0
Casa Mimi (Drinking)
Sector 3 0/ 0/ 0/ 1600/ 0/
Casa Yoni (Drinking)
Sector 3 0/ 0/ 0/ 0/ 0/
Casa Julio (Tap)
Sector 1 0/0 20/0 20/0 1500/1800 0/20
Casa Julio (Drinking)
Sector 1 0/0 0/0 0/0 20/40 0/20
Casa Henry (Drinking)
Sector 4 0/0 80/240 80/240 5650/10000
1200/2000
Casa Miguel (Drinking)
Sector 4 0/0 40/60 40/60 1800/5000 0/200
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Future Project
Continue testing on boiling water times v. effectiveness
Come up with possible solutions for housing water sanitation
Research Chlorination techniques used and appropriateness for San Pablo
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Questions?