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"ABSTRAKPertumbuhan penduduk dan perkotaan Kota Tangerang Selatan yang cukup tinggi menyebabkan kebutuhan akan air juga menjadi tinggi. Mayoritas masyarakat merasakan pengurangan debit air akibat tingginya ketergantungan pada air tanah permukaan dan baru 5-9% masyarakat yang mendapat akses air bersih dari PDAM/SPAM. Ancaman defisit air akan terus meningkat, mengingat keberadaan air tanah sangat dipengaruhi oleh faktor iklim, tutupan lahan, dan aktivitas manusia. Riset ini menganalisis tingkat risiko ketersediaan air di Tangerang Selatan. Riset ini menggunakan metode kuantitatif dan kualitatif, melalui observasi, wawancara, dan survei di masyarakat. Hasil riset menunjukkan terjadi peningkatan defisit air sejak tahun baseline 1981-2014 dan meningkat pada tahun proyeksi 2015-2045 diikuti dengan peningkatan tingkat bahaya di sebagian wilayah Tangerang Selatan. 3,7% kelurahan diproyeksi mengalami risiko defisit air esktrim tinggi. Sejumlah rencana aksi adaptasi dan mitigasi diusulkan untuk menghadapi dan mengantisipasi ancaman risiko defisit air yang lebih parah di masa mendatang.

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ABSTRACTThe high population and urban growth in South Tangerang City has caused the high demand for water. The majority of inhabitants have felt the decrease of water flow due to high dependency on surface groundwater as only 5-9% of the inhabitants have access to water supplied by PDAM/SPAM. The threat of water deficit will continue to increase considering that the groundwater supply is highly influenced by climate variability, land cover change and human activities. This research aims to analyse the risk level of water supply in South Tangerang. The research uses quantitative and qualitative methods carried out through observation, interviews and community survey. Research results show that an increase in water deficit has been in place since baseline years 1981-2014 and increasing at the projection years 2015-2045, which will be followed by increasing hazard level in several areas of South Tangerang. As many as 3,7% of wards are projected to be exposed to extremely high risk of water deficit in the future. A number of adaptation and mitigation actions are put forward facing and anticipating the worsened water deficit threat in the future."

"Rendahnya cakupan pelayanan PDAM Kota Bekasi memicu warganya untuk menggunakan sumber air berbasis mandiri. Pemantuan layanan air penting dilakukan untuk menciptakan air minum yang aman sesuai definisi oleh WHO, yaitu: 1) dapat di akses; 2) tersedia saat dibutuhkan; dan 3) bebas dari kontaminasi. Penelitian ini bertujuan untuk mengetahui kontaminasi E. coli pada air tanah dan POU serta keterkaitannya dengan kejadian diare, melihat hubungan antara ketinggian muka air tanah dengan curah hujan, serta menilai kontinuitas air tanah di Kelurahan Jatiluhur, Jatirangga, dan Sumur self-monitoring menggunakan AquagenX, kuisioner, alat pengukur curah hujan dan ketinggian muka air tanah. Berdasarkan hasil penelitian, sampel air yang belum diolah memiliki risiko terkontaminasi dua kali lebih tinggi dibandingkan dengan air yang sudah diolah (POU). Kesesuaian data antara hasil self-monitoring dengan yang dilakukan tim peneliti terbilang tinggi, yaitu 85-90%. Hasil uji statistik tidak menunjukkan adanya korelasi antara kontaminasi E. coli pada air minum dan kejadian diare, serta antara curah hujan dengan ketinggian muka air tanah. Koefisien determinasi sebesar 0,75 untuk analisis regresi linier menandakan curah hujan dan tinggi muka air tanah memiliki keterkaitan yang baik. Kontinuitas sumber air self-supply di Kota Bekasi dinilai tinggi, dan dapat dipertimbangkan sebagai sumber air utama.

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The low service of PDAM Kota Bekasi has caused its citizens to use self-supply water sources. The importance of monitoring to reach safely managed drinking water according to WHO, including: 1) accessible; 2) available; and 3) free from contamination. This study aims to determine E. coli contamination in groundwater and its relationship to diarrhea, to corelate groundwater level and rainfall, and to assess the continuity of groundwater in Jatiluhur, Jatirangga, and Sumur Batu Villages, Bekasi City. Data was obtained by self-monitoring using AquagenX, questionnaires, rainfall gauges and groundwater levels. Based on the results, untreated groundwater have a risk of contamination twice as high as treated groundwater. The accuracy of the data between the results of the self-monitoring water quality test and the research team is fairly high, at 85-90%. The results of statistical tests did not show a correlation between E. coli contamination in drinking water and the incidence of diarrhea, as well as rainfall and ground water level. The coefficient of determination is 0,75 indicates that rainfall and groundwater level have a good linear regression model. The continuity of self-supply water sources in Bekasi City is highly valued, and can be considered as the main water source."

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