Dengue hemorrhagic fever is an infectious disease caused by dengue virus and is transmitted by aedes aegypty mosquitoes. Puskesmas Blahbatuh I in 2016 is included in the top 10 cases of Dengue Fever which is 195 cases (Dinkes, 2017). The purpose of this research is to know the level of density of mosquito larvae Aedes aegypty as dengue fever vector in the working area UPT Kesmas Blahbatuh I Year 2018. Type of research used in this research is descriptive research type with cross sectional approach. This research was conducted in working area of UPT Kesmas Blahbatuh I which consists of five villages namely Medahan Village, Keramas Village, Pering Village, Belega Village and Bona Village.Obtained HI value (House of Indeks) : 16 %, CI (Container Indeks): 8 %, BI (Bruteu Indeks): 16 %, ABJ (Larva Free Rate) : 84% and DF (Density Figure ) : 3 as a medium density. The Prevention is do PSN or eradiation of mosquito breeding. The conclution is the area of UPT Kesmas Blahbatuh I has been moderate the mosquito larvae density.

ODF (Open Defecation Free) or Free Defecation is a village/kelurahan where 100% of the people have defecated in healthy latrines. Ambengan Village is one of the villages that has not been ODF in Buleleng Regency. There are 89.6% who are ODF and 10.4% are not ODF from 1,278 households in Ambengan village. The purpose of this study was to determine the relationship between knowledge and attitudes with the Free Status of Open Defecation. This study uses a cross-sectional design with a sample of 93 respondents and data analysis using the Chi-Square statistical test. Respondents with good knowledge (45.2%), moderate (36.6%) and less (18.3%). Respondents with good attitude (43%), moderate (37.6%) and less (19.4%). The results of the Chi Square test showed that there was a relationship between the respondent's knowledge (p = 0.000) and the respondent's attitude (p = 0.000) with the status of free defecation. It can be concluded that there is a relationship between knowledge and attitude with open defecation free status in Ambengan village. Public health center to carry out counseling about ODF (Open Defecation Free) to the community and villages can make rules regarding the prohibition of open defecation.

: Sanitation of public places is an effort to monitor and prevent losses as a result of unkempt public places that result in the transmission of various types of diseases, environmental pollution and health disorders. Public facilities are one of them market. Dirty and rundown markets can be a place of vector breeding and a place of spread of infectious diseases for buyers and sellers, therefore there needs to be sanitary supervision in the market. The purpose of this study is to find out the sanitation situation of Blahbatuh Public Market in Blahbatuh Subdistrict, Gianyar Regency 2021. The type of research used descriptively is to review the sanitation of Blahbatuh Public Market including buildings, sanitation facilities and market security by using observation sheets. The results of the research on the sanitary condition of Blahbatuh Public Market obtained include buildings with a score of 14 categories. Sanitation facilities with a score of 18 categories are sufficient. Market security with a score of 5 categories is enough. In general, the sanitary condition of Blahbatuh Public Market scored 37 with enough categories. Researchers recommend treating and equipping market means. To traders and visitors to jointly maintain market facilities and market cleanliness. Keywords: Situation, Sanitation, Market