- A Note from the Aquatics Director Regarding the Adenovirus 7 cases at the University -

Chlorine is an effective disinfectant in killing Adenoviruses and per State and Federal guidelines, we maintain chlorine levels in our pools above the minimum standards. Both the instructional pool and 50-meter pool are sanitized using calcium hypochlorite in tablet form (about 60% active strength) via erosion tanks with booster pumps. pH is regulated by Co2 gas via metered feeders. In the instance, there is an issue with the levels of either the disinfectant or the pH they are fixed by using sodium hypochlorite (liquid chlorine about 12% active strength) and muriatic acid ( about 31.5% active strength). Liquid chemicals can be added directly to the pools before and or after operating hours to make adjustments.

In the event that the chlorine or pH is outside of legal ranges the pool operators close the pool, add the necessary chemicals, and reopen after 30 minutes. Per COMAR the acceptable legal range for chlorine as a sanitizer is 1.5 ppm - 10 ppm. By the same regulations, the acceptable legal range for pH is 7.2-7.8. In general, the University’s pools are kept between 2.5ppm - 3.5ppm and 7.5 pH. We also utilize UV filtration as supplementary disinfection at about 60(mJ/cm2). Water chemistry readings are done every day that the pools are open in two-hour increments per the minimum requirements of COMAR.

Per the recommendations of Dr. McBride, our Director of the Health Center on campus, we have also increased the frequency with which we clean the surfaces in our facilities, including the Natatorium. The lifeguard staff did a complete facility deep clean after the last event on Sunday and will do another in preparation for our upcoming event on Thursday.

I am also sharing the Health Center's website, which outlines steps the University has taken with regard to Adenovirus.

I look forward to welcoming you and your family to our facility.


Natalie Taylor

Assistant Director, Aquatics

University Recreation & Wellness