Table 2.

Classification of 60 sampling days at Swansea Bay designated sampling point during summer 2011 using probability of gastrointestinal illness (pGI) thresholds defined in the World Health Organization guidelines (WHO, 2003: Table 4.7 Page 70).

Category	GI Risk	No. Days	% of Days
pGI < 1%	Negligible	10	16.7
pGI 1–5%	Low	14	23.3
pGI 5–10%	Moderate	9	15.0
pGI > 10%	High	27	45.0