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National Drinking Water Database

o-Xylene in Delaware

o-Xylene is a petroleum-derived solvent used in the printing, rubber, and leather industries; it is also used as a cleaning agent, a thinner for paint, and an ingredient in paints and varnishes.

The Most Polluted Communities in Delaware

17 water utilities reported detecting o-Xylene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average o-Xylene level

RankSystem Population Served Positive test results of total reported tests Average Level
1Seaford Water Department
Seaford, DE
6,6991 of 73.6 ppb
(0 to 25.2 ppb)
2Selbyville Water Department
Selbyville, DE
1,6452 of 191.06 ppb
(0 to 19.2 ppb)
3Beaver Creek
3503 of 70.75 ppb
(0 to 2.8 ppb)
4Oak Crest Farms
Dover, DE
5312 of 80.49 ppb
(0 to 3.38 ppb)
5Bethany Beach Water Department
Bethany Beach, DE
12,1281 of 60.36 ppb
(0 to 2.13 ppb)
6Pepper Ridge Park
1802 of 60.33 ppb
(0 to 1.4 ppb)
7Artesian Water Company
Newark, DE
201,0007 of 1340.3 ppb
(0 to 31 ppb)
8Thomas Cove
Newark, DE
3,4006 of 260.26 ppb
(0 to 3.1 ppb)
9Delaware Correctional Center
Smyrna, DE
2,0001 of 100.21 ppb
(0 to 2.1 ppb)
10Kenton District
661 of 70.09 ppb
(0 to 0.6 ppb)

Health Based Limits for o-Xylene

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

Violation Summary for o-Xylene in Delaware

There are no violations reported for this contaminant in Delaware