WATER QUALITY STATUS BASED ON POLLUTION INDEX TO MEET THE NEEDS OF SANITARY HYGIENIC WATER FOR COMMUNITIES AROUND LAKE SENTANI IN JAYAPURA REGENCY

: Water is one of the most important elements on earth. Water is needed by all living things, both humans, plants and animals. Consuming clean and sanitary water is absolutely necessary to avoid unwanted negative impacts. This research was conducted in February 2022 and aims to determine the status of the water quality of Sentani Lake, Jayapura Regency based on the pollution index according to the hygienic and sanitary water quality standards according to the Regulation of the Minister of Health of the Republic of Indonesia Number: 32 of 2017 concerning Environmental health quality standards and water health requirements for sanitation hygiene needs, swimming pools, solus per agua and public baths. The study used 15 (fifteen) water pollution parameters, namely: physical parameters (turbidity, color, TDS and temperature), and chemical parameters (pH, iron, fluoride, hardness, manganese, nitrate, cyanide, detergent and total pesticides) as well as biological parameters (total coliforms and E. coli). The samples in this study were taken from 5 (five) sample points (research stations) namely the mouths of the Haway, Yabawi, Hobay and Kamwalker Rivers which are the inlet of Sentani Lake and the headwaters of the Jaifuri River which is the outlet. The results showed that at stations 1, 2, 3, 4 and 5, the pollution index (PIj) was 4.07; 3.10; 2.30; 3.75 and 3.88, all of which are in the range of values of 1 ≤ PIj ≤ 5 with lightly polluted status. This standard was based on the Regulation of the Minister of Health of the Republic of Indonesia Number: 32 of 2017 especially environmental health quality standards and water health requirements for sanitation hygiene purposes. Th Thus it can be concluded that the water quality status of Sentani Lake based on the pollution index method is in the lightly polluted category.


INTRODUCTION
Water is one of the components of the environment that is very important for development and growth not only for humans, but also for other living things .
Especially for humans, in daily life, water is used for drinking, cooking, bathing, washing and for other needs such as farming and growing fish for farmers or other activities. The high population growth has resulted in not all components of society being able to enjoy clean water.
In terms of public health, the need for water for sanitary hygiene purposes, swimming pools, SPA, and public baths must meet the quality requirements so that public health is guaranteed. Good use of water is in accordance with its designation based on water quality status in accordance with the regulation of the state minister of the environment number: 115 of 2003 concerning Guidelines for Determining Water Quality Status. (Alihar, 2018, p. 68) (Alihar, 2018, p. 68) (Literate & Indonesia, 2020).
The availability of water on Earth is always permanent, meaning that it does not experience additions or subtractions because water undergoes a hydrological cycle and only it changes its forms.
Although the amount of water on Earth is always fixed, the quality of water changes along with the growth of the number of human populations and the activities that accompany them. The Pollution Index (IP) is determined for an allotment, then it can be developed for several designations for all parts of a body of water or part of a River.
The Pollution Index (IP) includes various groups of independent and meaningful quality parameters. Water quality on the basis of the Pollution Index (IP) can provide input to decision makers in order to assess the quality of water bodies for an allotment and take actions to improve quality if there is a decrease in quality due to the presence of polluting compounds, in addition to water for Sanitary Hygiene Purposes is water of a certain quality used for daily purposes which quality is different from the quality of drinking (Storet, 2016, p. 9) (Storet, 2016, p. 9) (Literate & Indonesia, 2020     Discussion of Biological Index Parameters: while at the other 4 stations the total coliform index parameter is higher than the threshold limit of 50 CFU / 100 mL. The high parameters of the total coliform index at station I, station II and station IV are due to the presence of domestic waste that is directly discharged into Sentani Lake. Likewise, at station V (Sentani Lake outlet) the total coliform content is still quite high. Water Quality Status of Sentani Lake

E. coli
The following description will be presented about the results of the calculation of the water quality status of Sentani Lake at 5 (five) stations (location points) and the comparison of water quality stauses to five stations (location points) and their discussion.   Status is in index class 1 < PIj ≤ 5, which means that the category is lightly polluted.
There is 1 parameter that exceeds the threshold value, namely the total coliform where the coastal communities of the lake dump their domestic waste directly into the lake. downstream of the River whose waste is discharged into the River, the River water is slightly brownish, but the community still uses it for bathing and washing.