The Power of Information

National Drinking Water Database

National Drinking Water Database - Chemical Contaminants


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

3-Hydroxycarbofuran is a metabolite of the insecticide carbofuran, a fumigant used on rice and alfalfa.

Found above
health guidelines
Found above
legal limit
Water utilities
People Served

Health Concerns for 3-Hydroxycarbofuran:

3-Hydroxycarbofuran Exposure by State

Water utilities in 5 states have reported detecting 3-Hydroxycarbofuran in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with 3-Hydroxycarbofuran contamination
New York1800

The Most Polluted Communities

30 water utilities reported detecting 3-Hydroxycarbofuran in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average 3-Hydroxycarbofuran level

RankSystem Population Served Positive test results of total reported tests Average Level
1Town of LA Plata
La Plata, MD
9,5002 of 25 ppb
(5 ppb)
2Gibson Island
Millersville, MD
8001 of 15 ppb
(5 ppb)
3Price River Water Imp Dis
Price, UT
7,6591 of 13 ppb
(3 ppb)
La Plata, MD
66,8974 of 72.86 ppb
(0 to 5 ppb)
5Naval Support Facility, Indian Head
Indian Head, MD
3,4601 of 22.5 ppb
(0 to 5 ppb)
6Glen Meadows Retirement Community
Glen Arm, MD
4001 of 22.5 ppb
(0 to 5 ppb)
7Cedar Ridge Children's Home
Williamsport, MD
451 of 22.5 ppb
(0 to 5 ppb)
8Town of Snow Hill
Snow Hill, MD
2,4091 of 22.5 ppb
(0 to 5 ppb)
9Ocean City
Ocean City, MD
30,0001 of 31.67 ppb
(0 to 5 ppb)
10Glen Burnie-Broadneck
Millersville, MD
249,6001 of 41.25 ppb
(0 to 5 ppb)

Testing Summary for 3-Hydroxycarbofuran

Are tests routinely required for 3-Hydroxycarbofuran by federal law?No
Water suppliers reporting tests for 3-Hydroxycarbofuran (2004-2009):12,031 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.4 per year


Type of concern: Reference:
One or more in vitro tests on mammalian cells show positive mutation results RTECS®- Tsitologiya i Genetika 1984

Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
RTECS®- Tsitologiya i Genetika 1984CARBAMIC ACID, METHYL-, 2,3-DIHYDRO-2,2-DIMETHYL-3-HYDROXY-7-BENZOFURANYL ESTER• mutagenic - Positive mutation assay: Cytogenetic Analysis ( human lym)


government/industry list/academic study reference
RTECS®- Tsitologiya i Genetika 1984RTECS®- Tsitologiya i Genetika. Cytology and Genetics. For English translation, see CYGEDX. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 18(1),17,1984

"RTECS®" is a United States trademark owned and licensed under authority of the U.S. Government, by and through MDL Information Systems, Inc.