Indicator Gauge Icon Legend
Legend Colors
Red is bad, green is good, blue is not statistically different/neutral.
Compared to Distribution
the value is in the best half of communities.
the value is in the 2nd worst quarter of communities.
the value is in the worst quarter of communities.
Compared to Target
meets target; 
does not meet target.
Compared to a Single Value
lower than the comparison value;
higher than the comparison value;
not statistically different from comparison value.
Trend
non-significant change over time; 
significant change over time; 
no change over time.
Compared to Prior Value
higher than the previous measurement period;
lower than the previous measurement period;
no statistically different change from previous measurement period.
Significantly better than the overall value
Significantly worse than the overall value
No significant difference with the overall value
No data on significance available
Copper Contaminants in Drinking Water
This indicator is archived and is no longer being updated. Click to learn more
Copper milligrams per liter (mg/L) concentration in Truckee Meadows Water Authority (TMWA) drinking water.
The Action Level at Consumer Taps is 1.3 milligrams per liter (mg/L). The level of copper is consistently well below the Action Level set by the EPA for safe drinking water.
Copper is a naturally occurring metal. It can be associated with the erosion of natural deposits or the corrosion of plumbing systems.
TMWA is required by federal, state and local water regulations to monitor and meet regulatory standards for more than one hundred contaminants. All water delivered to its customers is treated and has been in compliance with all EPA (Environmental Protection Agency) and State of Nevada standards and regulations.
For more information on contaminants in drinking water, visit TMWA
Why is this important?
Safe, reliable and high quality drinking water is essential and an environmental determinant of health.
TMWA is a member of the Partnership for Safe Water, implementing prevention programs where legislation and regulation does not exist, to increase drinking water protection against microbial contamination.
Note: The EPA's monitoring rule combines copper and lead, as both are historically common plumbing materials. Read more about the rule regulating copper in drinking water: https://www.epa.gov/dwreginfo/lead-and-copper-rule.
Measurement period: 2022
Maintained by: Truckee Meadows Tomorrow
Last update: July 2023
The maximum level of this graph is set at 1.3 mg/L, which is the Action Level set by the EPA.
Graph Selections
Data Source
- Truckee Meadows Water Authority
Note: This source uses Zip Code Tabulation Areas (ZCTAs) for its Zip Code data. Learn more
Maintained By: Truckee Meadows Tomorrow
Filed under: Environmental Health / Toxins & Contaminants