Rainwater is the main source of drinking water in tropical communities, especially in West Kalimantan. Air contamination causes rainwater to become acidic and cloudy and adds heavy metals such as Pb into rainwater. In addition to pollution, the way in which the rainwater is collected such as through zinc roofing also exposes the rainwater to heavy metals. The presence of Pb in rainwater will have an impact on the health of the community in the long run. The model of simple water treatment using filtration is needed to overcome this problem with the use of media available in the region. The media used are in the form of mollusk sand and activated carbon. In the end, the mollusk sand filtration model and activated carbon sorption were effectively used to filter polluted rainwater to be safe for consumption.

The air quality that is increasingly carrying out pollution as a result of pollution by human activities is of concern to the world, both developed and developing countries. The impact of air pollution is unavoidable, especially for health. Several efforts have been made to suppress the occurrence of pollution starting from the control of sources, media, and protective efforts in human beings. Focusing on protective efforts, this study was carried out by designed respiratory masks capable of adsorbing toxic gases in ambient air by utilizing mask materials on the market with the addition of activated carbon; the study was carried out with an experimental approach. Testing distinguishes the ability of cotton, spunbond, meltblown, and activated carbon as a respiratory mask to absorb toxic gases such as COx, NOx, and SOx. Test statistics are using the ANOVA test with a confidence level of 95%,α= 5%. The results show that combining activated carbon, spunbond, and meltblown is more effective compared to respiratory masks made from spunbond and meltblown (surgical masks) in absorbing toxic gases.

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The supply of clean water is a major problem in both developed and developing countries. The abundant amount of peat water can be a potential source of clean water in areas with peatlands. Peat water treatment can be conducted effectively and efficiently by integrating various existing methods, such as aeration, sedimentation, and filtration using shell sand and activated carbon. The results show that the parameters of color, turbidity, Ferrum (Fe), microbiological parameters, and pH of peat water can be conditioned according to clean water standards. The average peat watercolor parameter before processing is 866.7 PtCo, 10.96 NTU turbidity, 2.48 mg L–1 Fe, Fe, 4.30 pH, and coliform (microbial) peat water at 1068 CFU and after passing the color combination treatment to 28.83 PtCo, turbidity 2.19 NTU, Fe 0.22 mg L–1, and coliform 20 CFU and pH 6.83. Integrated peat water treatment is the most effective at the filtration and adsorption stages.

Carbon monoxide (CO) pollution to the environment hurts health. The ability of Hb to bind CO is stronger than O 2 , which hurts humans in a CO-polluted environment. This condition impacts CO levels in the body and increases with low oxygen levels in the blood. The CO content in the body that exceeds the threshold triggers symptoms of headaches, prolonged fatigue, and even death. This study aimed to determine the effect of exposure to CO in free air with levels of COHb and health complaints on parking attendants and traders in the lower market terminal of Bandar Lampung City. This study used a retrospective cohort design. The population in this study were traders and parking attendants who worked at the Pasar Bawah Terminal in Bandar Lampung City, amounting to 152 people, and parking attendants totaling 35 people divided into two shifts. The sample size is 127 people. Data were taken from measuring COHb levels and using a questionnaire regarding health complaints that respondents often felt. Data analysis used chi-square. The average exposure to CO levels in the market terminal under the basement of the Tanjungkarang supermarket was 23.68 ppm, with the highest level of 25.87 ppm. Most of the respondents are male, aged over 35 years, and have worked for more than three years. Most respondents do not wear masks when working in the exposure area; the COHb level in the blood is above 5%, and most have complaints of health problems. There is a significant relationship between COHb levels in the blood with CO exposure, length of work, and health problems and no significant association with age and habits of using personal protective equipment (PPE).