1. a) The manager/operator determines that conditions at a swimming facility create an immediate danger to health or safety.

2. b) Bacteriological results show any of the following:

   1. 1) Coliform concentration of 10 per 100 ml in two consecutive samples;
   2. 2) Presence of fecal coliform, E coli, beta hemolytic Streptococcus or Pseudomonas in any sample.
3. c) Turbidity exceeds the criteria outlined in Section 820.320(d).
4. d) A disinfectant residual consisting of a minimum of 0.5 p.p.m. free chlorine or 1.0 p.p.m. bromine is not present or the disinfection system is inoperable.
5. e) The total chlorine concentration exceeds 5 p.p.m. or the total bromine concentration exceeds 10 p.p.m.
6. f) The recirculation pumps or the filters are inoperable.
7. g) The pH of the swimming facility water is less than 6.8 or greater than 8.0.
8. h) A patron has defecated or vomited in the pool or aquatic feature. When this occurs, the manager/operator shall remove visible foreign matter and superchlorinate the affected area of the swimming facility. The swimming facility shall remain closed for a minimum of 30 minutes following superchlorination, or longer if necessary, for the disinfectant residual to return to prescribed levels. When an incident occurs in a swimming facility with a capacity greater than 50,000 gallons, the swimming facility manager/operator may elect to prohibit use of only the affected area in lieu of closing the swimming facility.
9. i) A suction outlet cover is loose, improperly installed, damaged or missing.
10. j) The Department issues a written notice to close the swimming facility, in which case the notice shall be posted by the owner, manager/operator or licensee at the entrance to the swimming facility area. The swimming facility shall remain closed until the Department has authorized the reopening of the swimming facility.
11. k) Lightning is sighted or thunder is heard at outdoor swimming facilities (see Section 820.360).

The manager/operator shall immediately close any swimming facility, except a bathing beach, whenever any of the following conditions exist:

(Source: Amended at 37 Ill. Reg. 16539, effective October 4, 2013)