Related Experiment Video
Updated: Jul 15, 2026
Automated Hospital Room Disinfection Utilizing a Novel Aerosolized Hydrogen Peroxide Microdroplet Disbursing Technology
Published on: February 24, 2026
[Chlorination and bacterial contamination. Hospitals with troubled waters]
Alejandro E Macías1, Rebeca Monroy, Juan M Muñoz
1Facultad de Medicina de la Universidad de Guanajuato. aaeemmhh@yahoo.com
Objective:
To know the quality of the water from hospitals and the risks that poor chlorination implies.
Methods:
We analyzed 90 water specimens from 15 hospitals (9 from the private and 6 from the public sector). Specimens were obtained from three areas (hospitalization ward, operating room, and kitchen) in two visits.
Results:
By microbiologic analysis, we found 30 (33.3%) contaminated specimens. By chemical analysis, we found only 49 (54.5%) specimens with adequate chlorination (> or = 1 mg/L). Of the 30 contaminated specimens, only 7 (23.3%) had adequate chlorination. On the other hand, of the 60 specimens without contamination, 42 (79%) had adequate chlorination (chi2 = 17.561, p < 0.001). The significant difference was sustained when the criterion for appropriate chlorination was established at > or = 0.5 mg/L.
Conclusions:
Hospitals require guidelines for water chlorination and testing to maintain it at > or = 0.5 mg/L in every point of use.
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