Abstract: In recent years, there has been a noticeable trend in the interior design sector towards creating interior-built environments that prioritize both health and sustainability. This shift, termed as environmentally sustainable interior design (ESID), depends heavily on the careful selection of eco-friendly interior materials (EFIMs) and suitable indoor plants. Consequently, the study was conducted on EFIMs available in the local market of Bahrain. A sample of n=30 local stores supplying interior finishing materials was selected for the study. Data were collected via five methods. Firstly, a review of existing EFIMs. Secondly, the availability of EFIMs was observed through a non-participatory approach. Thirdly, a survey of EFIMs supplied in the Bahraini market was also carried out. Fourth, a semi-structured interview with retailers, final and fifth, semi- structured interview with local interior designers was scheduled. Data were collected and processed using Microsoft Excel program. In the context of phytoremediation, formaldehyde purification experiments have been performed by selecting three indoor non-native plants namely, Epipremnum aureum (Pothos plant), Chlorophytum comosum (Spider plant), and Spathiphyllum wallisii (Peace lily). Sensors and real-time instruments IQ-610 direct sense probe was used. Data were processed and statistical analysis (ANOVA test) has been performed for the data. The results of the EFIMs study show 70% of suppliers have stocked EFIMs with a total of sixty-three EFIMs which were collected and identified. Among them, 67% of EFIMs were categorized as flooring finishes followed by wall finishes (25%) and ceiling finishes (8%). The majority (80%) of the interviewed interior designers did not use EFIMs and stated that their clients did not request EFIMs for their projects. All the interviewed interior designer agreed that clients are not aware of the importance of EFIMs. The results of the HCHO phytoremediation experiments for single potted plants revealed that the most efficient plant was S. wallisii, followed by E. aureum, and C. comosum 73.0, 71.5, and 71%, respectively. While the HCHO phytoremediation for 2 identical potted plants revealed that the most efficient plant was E. aureum, followed by S. wallisii, and C. comosum 77.5, 74.6, and 73.0%, respectively. It is recommended to continuously design, and supply EFIMs, to initiate awareness programs for public, and to include EFIMs knowledge in educational curriculums. Interior designers are recommended to search and apply updated EFIMs in their projects. It was also recommended to test similar plants in real environments for a long time and expose them to different air pollutants.