Question 1015 of 223 · California Water Treatment Operator Exam
Which watershed activity is the greatest threat to a surface water supply used for drinking?
Exactly one answer is correct.
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Correct answer to question 1015
- A: Unmanaged livestock grazing and septic discharges near tributaries
Explanation
Animal and human waste carry pathogens such as Giardia and Cryptosporidium into the source. Buffer zones, fencing and access control are protective measures.
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