Surface Water Quality Monitoring Data Search Page

The ADEQ's Water Quality Monitoring Program includes the monitoring of the chemical parameters in the water of rivers, streams and lakes within the State.

The monitoring network of rivers and streams includes over 160 stations which are sampled monthly, over 100 stations that are sampled on a bi-monthly or quarterly schedule and an additional 30-50 stations that are intensively sampled over a short period of time for special purposes. Some of these stations have been regularly sampled since the 1970s. Collection of the routine, monthly water samples is performed by the Water Divisions’ Inspection Branch and laboratory analyses are conducted by the Department’s Technical Services Division. The quarterly or bi-monthly sampling of unassessed or reassessed waters is conducted by Planning Branch personnel. Synoptic, watershed-intensive surveys of the physical, chemical and biological conditions of a watershed are also conducted by the Planning Branch personnel. The results of the water quality analyses done by ADEQ can be found in this database. Data from September of 1990 to present is available on this web site. Data previous to September of 1990 can be found on EPA's web site.

The Lake and Reservoir Monitoring Program was not formalized until 1989 when the first statewide intensive monitoring of Arkansas’ significant publicly-owned lakes was conducted. This included measurement of approximately 30 chemical parameters plus bacteria and chlorophyll a. At least 80 lakes were included. They range in size from 60 to over 45,000 acres and total 356,254 acres. A limited survey of lakes began in 2011 and additional lake data are collected for reference lakes throughout the state or to support other projects.

Contact Help-WaterQualityDB@adeq.state.ar.us for assistance.