Illegal gold mining results in river water pollution which is a decrease in the
quality of river . Water quality which is used as a means to meet the needs of daily
life. This study aims to determine the role and constraints of the PRKPLH service
in controlling water pollution due to illegal gold mining in Tanah Laut Regency.
This type of research is empirical legal research conducted directly to respondents to obtain primary data as primary data and supported by secondary data. The role of the PRKPLH service is to supervise the control of water pollution due to illegal gold mining in Tanah Laut Regency by following up on reports filed by the public and taking preventative measures through dissemination of the importance of preserving the environment. The obstacles of the PRKPLH service in controlling water pollution due to illegal gold mining are the lack of human resources, facilities and infrastructure as well as the lack of public awareness in preserving the environment.