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Table 3 Estimated annual number of cases of mild and moderate illness (C90) due to water recreation, by activity, in millions a

From: Estimate of incidence and cost of recreational waterborne illness on United States surface waters

Activity

AGI

Respiratory

Eye

Ear

Skin

Swimming

29.14

(23.09–34.58)

9.22

(1.29–16.66)

--b

6.87

(2.62–10.25)

12.06

(6.99–16.87)

Kayaking

0.54

(0.11–0.97)

--b

0.63

(0.04–1.29)

--b

--b

Rowing

0.38

(0.03–0.76)

--b

0.42

(0.03–0.85)

--b

--b

Canoeing

0.78

(0.15–1.38)

--b

0.91

(0.05–1.84)

--b

--b

Motor boating

4.77

(0.94–8.50)

--b

5.59

(0.36–11.31)

--b

--b

Fishing

15.27

(4.12–25.12)

--b

--b

--b

--b

Total

50.95

(36.59–63.42)

9.22

(1.29–16.66)

7.55

(0.49–15.28)

6.87

(2.62–10.25)

12.06

(6.99–16.87)

Moderate Severityc

7.2%

13.7%

10.4%

24.3%

5.4%

  1. a Calculated based on estimated number of water recreation events and the attributable risk of illness, may not sum to estimated totals due to rounding
  2. b No excess illnesses expected, based on the attributable risk
  3. c Percent with moderate severity illness (those who contact their HCP or go to an ED)