For a data center, standards can address electricity, emissions, water, noise, waste, backup generation and construction. The rules should define how impacts are measured and reported.
An enforceable standard identifies locations, time periods, responsible parties and consequences for noncompliance. It must apply through operation rather than only during project approval.
ELI5
An environmental standard sets measurable rules for limiting or reporting an effect on the environment. It can cover energy, emissions, water, noise, waste or construction activity.
For example, a data center standard can limit nighttime noise at nearby homes and state exactly where and how it must be measured. The rule also needs reporting and enforcement so it remains meaningful after the project is approved.

