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Drinking Water Quality Report
City of Green River - Rock Springs, WY
Serves 11,900 people - Test data available: 2004-2008
This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the Wyoming Environmental Protection Agency. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results. Water utilities nationwide detected more than 300 pollutants between 2004 and 2009. More than half of these chemicals are unregulated, legal in any amount. Despite this widespread contamination, the federal government invests few resources to protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes test results for this utility and lists potential health concerns.
Contaminants Exceeding Health Guidelines
Testing History-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
|Total haloacetic acids (HAAs)Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.||10.28 ppb|
|Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.||15.04 ppb|
|NOTE: Each dot in the above graph represents one month.|
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.
Contaminants Not Detected - 1 chemicals
|2||Total Contaminants Detected (2004 - 2008)|
(pesticides, fertilizer, factory farms)
|0||Sprawl and Urban Pollutants|
(road runoff, lawn pesticides, human waste)
|2||Water Treatment and Distribution Byproducts|
(pipes and fixtures, treatment chemicals and byproducts)
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)
EPA Violation Summary
No violations were reported for this system since 2004.