According to Feature W05: Optimization Drinking Water Quality Management, part 1 of the WELL Core requirements, the project team must test water quarterly in drinking water dispensers and meet the following thresholds: Total Dissolved Solids (TDS) are 500 mg/L or less. If any sample exceeds these thresholds, remediation and re-testing occur within a month1. Therefore, the project team should take the step of remediation and re-testing within one month to address the issue of high TDS levels.
References: = Standard | WELL V2