Patent ID: 8783095

Claim:
An ultrapure water production facility, comprising: an ultrapure water production system; a supply pipe for supplying ultrapure water produced in the ultrapure water production system to a use point; and a monitoring system for monitoring a quality of the ultrapure water extracted from the supply pipe, comprising a first monitoring unit including a resistivity meter, a second monitoring unit in which one type or two or more types of measuring instrument, selected from the group consisting of a dissolved gas concentration meter, a TOC meter, a hydrogen peroxide concentration meter, a silica meter, a boron meter, an evaporation residue meter, and a water temperature meter, are connected in parallel, a third monitoring unit including a particle meter, the third monitoring unit being provided in parallel with the first monitoring unit and the second monitoring unit, a transportation pipe for introducing a portion of monitoring wastewater discharged from the first monitoring unit into the second monitoring unit, and a discharging pipe for discharging the remaining of the monitoring wastewater, wherein the first monitoring unit and the second monitoring unit are connected in series.