Reading the Water Tests

Take real-shaped monitoring data and say what it means, including what it does not prove.

7 questions, free, marked as you go with a worked explanation on every one.

What this covers

Use the table. How many times higher is the lead at the mill site than the lead upstream?
Use the table. Which site's water is the most acidic?
Use the table. This group works to guidelines of 10 mg/L for nitrate and 5 micrograms per litre for lead. Which sites are over at least one of them?
Use the table. The nitrate is lower downstream than it is at the farm site. Which explanation best fits?
Use the table. What is the mean nitrate concentration across the four sites?
A pesticide that living things cannot break down is passed on at every level of the pyramid drawn. What is the resulting build-up in the top predators called?
A 250 mL water sample is found to contain 0.6 mg of nitrate. What is the concentration in mg/L?