priyanie amerasinghe "houisehold sewage disposal systems and their impact on groundwater...
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International Conference on Peri-Urban Landscapes: Water, Food and Environmental Security, Sydney, Australia, July 8-10, 2014. Priyanie Amerasinghe PresentationTRANSCRIPT
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Cover slide option 1 Title HOUSEHOLD SEWAGE DISPOSAL SYSTEMS AND THEIR IMPACT ON GROUNDWATER QUALITY IN PERI-URBAN FAISALABAD,
PAKISTAN
Peiruban 14,
Priyanie Amerasinghe, IWMI, IndiaWaqas Ahmed, IWMI, PakistanRobert Simmons, Cranfield University, UK
Periurban 14, UWS, Australia8-10 July 2014
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Content Objectives Site characteristicsMethodsResults and Discussion
Objective: To study the influence of sanitation infrastructure on the quality of water in drinking water bore wells in two peri-urban villages namely, Kehala and Chakera, Faisalabad, Pakistan.
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• Villages are next to the city of Faisalabad an industrial city• Mixed livelihoods. Agriculture is common• Chakera – Has a Wastewater Stabilization Pond and depends on WW
for agriculture • Kehaala - depends on ground water
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Hand Pump Latrine system The water samples were tested for selected water quality parameters, such as pH, EC and TDS, ammonia, bicarbonate, chloride, fluoride, nitrate, nitrite, sulphate, hardness and faecal coliforms/E.coli.
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National Program for Family Planning and Primary health care:Lady Health Workers
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HH HH %Class of disposal category/no unit Kehala Chakera Kehala Chakera
PFS > 9 m 13 15 4 5PFS 6 - 9 m 47 22 15 7PFS 3 - 6 m 147 91 47 30PFS < 3 m 74 72 23 24PFD 8 39 3 13PFN 5 0 2 0Total No 294 239 93 79OD 22 64 7 21Total No 316 303 100 100
PFS-Flush system/pit; PFD - Flush system/drain; PFN - Flush system/network;OD - open defecation
Status of on-site sanitation systems
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Distance between latrines and bore wells
Kehala Chakera
N=316 N=303
Average distance = 4.8±4.3 m (Kehala) and 4.0 ±3.3 m (Chakera)
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Distribution of E. coli in domestic water
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• pH = desirable range of 6.5 – 8.0. (WHO)
• Hardness = not significantly different <500 mg/L
• TDS = Chakera - 1000 mg/L (1746.86 - 2322.66 mg/t (mean ± 0.37). (p= 0.0005)
• Nitrate = 43 mg/L, (p=0.005),
Water Quality – Physico-chemical
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Distribution of Parasites (concentration method)
0
5
10
15
20
AL EC EH EV GL HN HW TS TT
Parasite Species
% In
fect
ion
Chakera WW
Kehala CW
AL– A. lumbricoides
EC– E. coli
EH– E. histolytica
EV– E. verrmicularis
GL- G. lamblia
HN- H. nana
HW- Hook worm
TS- T. saginata
TT- T. trichura
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Conclusions • Primary drinking water source was ground
water• A strong association between the ground water
quality (microbial contamination) and the distance to the on-site sanitation disposal unit.
• Bore wells placed too close to the hand pumps used for domestic purposes
• General sanitation standards were poor• Awareness on sanitation and drinking water is
essential to reduce ground water contamination• WSA should enforce the standards for water
and sanitation infrastructure.