Indicating Water Purification Ecosystem Service through Water Quality Assessment in Jetis Suruh Artificial Retention Pond, Sleman Regency

Freshwater ecosystem is an important need for humans. However, its availability is limited. Artificial retention pond as a freshwater ecosystem provides various ecosystem services including water purification. This study aimed to assess the water purification services in Jetis Suruh Artificial Retention Pond by comparing the water quality that enters the artificial retention pond and those that do not. Primary data were obtained from field surveys and water sampling using 5 parameters (pH, BOD, COD, nitrate, and phosphate). The water samples were obtained from surface of the pond or channel. The total sample used in this research is 8 samples and divided into two water flow systems. The results show that water quality in Jetis Suruh Artificial Retention Pond from each parameter show that these waters nearly still meet the requirements of class II water quality standards in Indonesia. The ranking results indicate that the Jetis Suruh Artificial Retention Pond has a capability in water purification as an ecosystem service. Unlike the branch channels (S1, S2, and S3) with uniform conditions and no significant changes, the Jetis Suruh Artificial Retention Pond improves water quality in S5, S6, and S7 (ranked first and second) from the poorest water quality in S4. The improvement is attributed to the pond's retention process, allowing aeration, sunlight penetration, and sedimentation of organic matter. © 2025 Institute of Physics Publishing. All rights reserved.