Equall concerning, water is diverted from the drinking supply.

=It is equally concerning that water is diverted from the drinking supply

同样令人担忧的是，水是从饮用水供应中转移出来的。

equally concerning为副词+形容词，作评论性状语

(1)equally adv.（程度）相当地，同样地 (英文解释：Equally means to the same degree or extent.）

All these techniques are equally effective. 

所有这些技术都同样有效。

Success doesn't only depend on what you do. What you don't do is equally important. 

成功不仅仅在于你做了什么，你没有做什么也同样重要。

（2）concerning  adj.让人不安的;令人担忧的(英文解释： If something is concerning, it causes you to feel concerned about it.）

It is particularly concerning that he is working for non-British companies while advising on foreign policy.  

让人尤为不安的是，他在提供外交政策咨询的同时却又供职于一些外国公司。