本校在水資源回收方面，目前八甲校區污水處理廠處理後再生水100%進入植栽澆灌系統，進行校區植物澆灌；另國鼎圖書館雨水儲留系統則作為澆灌及沖廁之用，故八甲校區廢(污)水已達到零排放。至於二坪山校區，未來將對該校區立德樓及雙電大樓，規劃雨水回收系統，透過優化智慧水資源管理，充分運用水資源。 

In terms of water resource recycling, the wastewater treatment plant at the Bajia Campus of National United University has achieved 100% reuse of treated effluent, which is fully redirected to the campus irrigation system for landscape watering. In addition, the rainwater retention system installed at the Guoding Library is utilized for both irrigation and toilet flushing purposes, thereby enabling the Bajia Campus to achieve zero discharge of wastewater.

As for the Erpingshan Campus, a rainwater harvesting system is planned for the Lide Building and the Double-Electric Building. The implementation will be carried out through the optimization of an intelligent water resource management system, thereby ensuring the efficient and sustainable utilization of water resources.

中水回收系統，如下圖 ：

Reclaimed Water Recycling System:

(As illustrated in the figure below.) 

有關聯合大學植物種類，可參考以下連結：

國立聯合大學八甲校區 109年度環境品質暨邊坡安全委託監測技術服務：https://cga.nuu.edu.tw/var/file/72/1072/img/904/685750172.pdf

其中，校園周邊有榕樹、茄冬樹、臺灣欒樹、相思樹、朴樹、馬纓丹 等耐旱植物。

For information regarding the plant species within National United University, please refer to the following document:
Environmental Quality and Slope Safety Monitoring Technical Service for the Bajia Campus of National United University (2020):
https://cga.nuu.edu.tw/var/file/72/1072/img/904/685750172.pdf

The surrounding campus area is planted with a variety of drought-tolerant species, including banyan (Ficus microcarpa), fish poison tree (Barringtonia racemosa), Taiwan golden rain tree (Koelreuteria elegans formosana), acacia (Acacia confusa), Chinese hackberry (Celtis sinensis), and lantana (Lantana camara).