Under the Lead & Copper Rule, what are the lead action level and copper level?

Under the Lead & Copper Rule, what are the lead action level and copper level?

• A. Lead action level = 0.015 mg/L, Copper = 1.3 mg/L
• B. Lead action level = 0.030 mg/L, Copper = 0.8 mg/L
• C. Lead action level = 0.010 mg/L, Copper = 2.0 mg/L
• D. Lead action level = 0.020 mg/L, Copper = 1.0 mg/L

Answer: (A)

In the Lead and Copper Rule, action levels are the thresholds that trigger corrective steps when concentrations exceed them. The lead action level is 0.015 mg/L, which is 15 micrograms per liter (15 ppb). The copper action level is 1.3 mg/L (1,300 ppb). These exact values are the standards used to determine when a water system must take actions like optimizing corrosion control, public education, or treatment adjustments. The correct numbers reflect these regulatory thresholds; other options mix up the values or use different thresholds.

In the Lead and Copper Rule, action levels are the thresholds that trigger corrective steps when concentrations exceed them. The lead action level is 0.015 mg/L, which is 15 micrograms per liter (15 ppb). The copper action level is 1.3 mg/L (1,300 ppb). These exact values are the standards used to determine when a water system must take actions like optimizing corrosion control, public education, or treatment adjustments. The correct numbers reflect these regulatory thresholds; other options mix up the values or use different thresholds.