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National Drinking Water Database


Xylenes (total) in Montana


Xylenes are a group of chemicals produced from petroleum and released as pollutants from chemical, plastics and synthetic fiber industries as well as printing, painting, and laboratory uses. [read more]

The Most Polluted Communities in Montana

11 water utilities reported detecting Xylenes (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Xylenes (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Power Teton County Water Dist
Power, MT
1678 of 87.19 ppb
(1.3 to 26 ppb)
2Sunrise Terrace Subd NO 2
Kalispell, MT
1081 of 44.25 ppb
(0 to 17 ppb)
3Flathead Co Water District NO 8
Whitefish, MT
3501 of 41 ppb
(0 to 4 ppb)
4Montana Aviation Research Co
Glasgow, MT
542 of 70.43 ppb
(0 to 1.5 ppb)
5Utility Solutions Zoot North Star
MT
8751 of 30.28 ppb
(0 to 0.85 ppb)
6Baxter Creek NO 2 Hoa
Bozeman, MT
4501 of 20.26 ppb
(0 to 0.52 ppb)
7Town of Fairview
Fairview, MT
7031 of 70.21 ppb
(0 to 1.5 ppb)
8Carter Chouteau Co Water Dist
Carter, MT
2001 of 40.2 ppb
(0 to 0.78 ppb)
9City of Cut Bank
Cut Bank, MT
4,7081 of 100.18 ppb
(0 to 1.8 ppb)
10Lower Pioneer Mountain Water System
MT
651 of 60.12 ppb
(0 to 0.75 ppb)

Health Based Limits for Xylenes (total)

StandardDescriptionLevel
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.1800 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.7000 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.10000 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.10000 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.40000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.40000 ppb

Violation Summary for Xylenes (total) in Montana

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Montana since 2004

Violation TypeNumber of Violations
Failure to monitor regularly116