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Wastewater is belong to one of the parts of sanitation objects. According to the studies, there is 7,98% of area was categorised as very high risk sanitation while 12,88% got high risk sanitation. There is still 1 % of the society practicing open defecation in the sewerage, and 0,27% to the land. As the part of sanitation, provision of wastewater treatment is one of the efforts to reach the universal access of 100-0100, which means achieving 100% served by proper sanitation. The pollution in the mainstream is caused by the untreated domestic wastewater, which is directly discharged to the river. The wastewater services in Surabaya City by 2015 is 97,53% with 43 domestic wastewater installed. Surabaya City has some rules to manage and control the domestic wastewater. The effluent of domestic wastewater treatment is controlled by the rules with some parameters. The nitrogen content of the effluent in some domestic wastewater treatment was analysed according to APHA. The strategies were described according to the local sanitation strategic in Surabaya City. This study shown that there were three out of seven units of ABR have higher concentration of ammonium comparing with the national standard. Surabaya City has Sanitation Development Plan 2017, which is clearly describing the strategies plan for the domestic wastewater development 2017-2021. These strategies including the implement of related local rules, increase of wastewater services, increase of knowledge, participation and awareness of the society, increase the provision and access of sanitation supporting facilities, and optimization of sludge treatment in Surabaya City. Keyword: ABR, Community-based sanitation, Domestic wastewater, Environmental management, Nitrogen removal, Sanitation

THE STRATEGIES TO REDUCE THE SPREAD OF NITROGEN FROM DOMESTIC WASTEWATER TREATMENT TO THE STREAMS IN SURABAYA CITY, INDONESIA