1,1-Dichloroethylene
Willow Grove Mill
NOTE: Willow Grove Mill purchases water from Artesian Water Company which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Artesian Water Company.
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 38 | 0 | ND |
| 2019 | ND | 36 | 0 | ND |
| 2020 | ND | 39 | 0 | ND |
| 2021 | ND | 18 | 0 | ND |
| 2022 | ND | 14 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 7 ppb
The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.
ppb = parts per billion
All test results
NOTE: Willow Grove Mill purchases water from Artesian Water Company which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Artesian Water Company.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-05 | 8011810-01 | ND |
| 2018-01-05 | 8011820-01 | ND |
| 2018-01-10 | 8011813-01 | ND |
| 2018-01-10 | 8011818-01 | ND |
| 2018-01-26 | 8014291-01 VOC | ND |
| 2018-01-26 | 8014295-01 VOC | ND |
| 2018-02-07 | 8021670-01 | ND |
| 2018-02-23 | 8015062-01 VOC | ND |
| 2018-02-27 | 8030889-01 VOC | ND |
| 2018-03-01 | 8024104-01 VOC | ND |
| 2018-03-01 | 8030886-01 VOC | ND |
| 2018-03-01 | 8030887-01 VOC | ND |
| 2018-03-05 | 8030881-01 VOC | ND |
| 2018-03-05 | 8030882-01 VOC | ND |
| 2018-03-05 | 8030888-01 VOC | ND |
| 2018-03-06 | 8030883-01 VOC | ND |
| 2018-03-06 | 8030884-01 VOC | ND |
| 2018-03-16 | 8030879-01 VOC | ND |
| 2018-03-27 | 8034448-01 VOC | ND |
| 2018-03-27 | 8034449-01 VOC | ND |
| 2018-04-04 | 8034691-01 | ND |
| 2018-04-09 | 8034683-01 | ND |
| 2018-04-20 | 8034686-01 VOC | ND |
| 2018-04-24 | 8044900-01 | ND |
| 2018-05-23 | 8053616-01 VOC | ND |
| 2018-06-12 | 8061422-01 | ND |
| 2018-07-06 | 8071563-01 VOC | ND |
| 2018-07-06 | 8071568-01 VOC | ND |
| 2018-07-09 | 8071570-01 VOC | ND |
| 2018-07-10 | 8071560-01 VOC | ND |
| 2018-07-10 | 8071578-01 VOC | ND |
| 2018-09-20 | 8093895-01 VOC | ND |
| 2018-10-08 | 8101733-01 VOC | ND |
| 2018-10-08 | 8101752-01 VOC | ND |
| 2018-10-09 | 8101743-01 VOC | ND |
| 2018-10-16 | 8101736-01 VOC | ND |
| 2018-10-16 | 8101741-01 VOC | ND |
| 2018-11-21 | 8105267-01 VOC | ND |
| 2019-01-04 | 8124609-01 SUVO | ND |
| 2019-01-04 | 8124611-01 SUVO | ND |
| 2019-01-10 | 8124601-01 SUVO | ND |
| 2019-01-25 | 8122188-01 SUVO | ND |
| 2019-01-25 | 8122189-01 SUVO | ND |
| 2019-01-28 | 8122190-01 SUVO | ND |
| 2019-01-30 | 8105269-01 SUVO | ND |
| 2019-02-27 | 9020961-01 SUVO | ND |
| 2019-03-07 | 9014984-01 SUVO | ND |
| 2019-03-07 | 9032813-01 SUVO | ND |
| 2019-03-12 | 9020956-01 SUVO | ND |
| 2019-03-14 | 9020955-01 SUVO | ND |
| 2019-03-15 | 9020957-01 SUVO | ND |
| 2019-03-15 | 9020959-01 SUVO | ND |
| 2019-03-15 | 9020960-01 SUVO | ND |
| 2019-03-21 | 9033622-01 SUVO | ND |
| 2019-03-21 | 9033623-01 SUVO | ND |
| 2019-03-28 | 9033626-01 SUVO | ND |
| 2019-03-28 | 9034331-01 SUVO | ND |
| 2019-04-10 | 9041997-01 SUVO | ND |
| 2019-04-10 | 9042005-01 SUVO | ND |
| 2019-04-10 | 9043383-01 SUVO | ND |
| 2019-04-12 | 9042017-01 SUVO | ND |
| 2019-04-18 | 9042000-01 SUVO | ND |
| 2019-04-25 | 9045411-01 SUVO | ND |
| 2019-07-03 | 9071966-01 SUVO | ND |
| 2019-07-10 | 9071964-01 SUVO | ND |
| 2019-07-10 | 9071976-01 SUVO | ND |
| 2019-07-11 | 9071956-01 SUVO | ND |
| 2019-07-16 | 9071959-01 SUVO | ND |
| 2019-09-16 | 9085950-01 SUVO | ND |
| 2019-10-02 | 9101662-01 SUVO | ND |
| 2019-10-04 | 9101657-01 SUVO | ND |
| 2019-10-08 | 9101674-01 SUVO | ND |
| 2019-10-10 | 9101664-01 SUVO | ND |
| 2019-10-18 | 9101655-01 SUVO | ND |
| 2020-01-06 | 9124502-SUVO | ND |
| 2020-01-07 | 9124494-SUVO | ND |
| 2020-01-07 | 9124513-SUVO | ND |
| 2020-01-08 | 9124497-SUVO | ND |
| 2020-01-08 | 9124504-SUVO | ND |
| 2020-01-21 | 9105680-01 SUVO | ND |
| 2020-01-21 | 9113969-01 SUVO | ND |
| 2020-01-22 | 9124545-01 SUVO | ND |
| 2020-01-22 | 9124546-01 SUVO | ND |
| 2020-01-27 | 0011126-01 SUVO | ND |
| 2020-01-27 | 9124543-01 SUVO | ND |
| 2020-01-27 | 9124544-01 SUVO | ND |
| 2020-01-28 | 0011127-01 SUVO | ND |
| 2020-01-29 | 0014351-01 SUVO | ND |
| 2020-01-29 | 0014352-01 SUVO | ND |
| 2020-01-29 | 0014353-01 SUVO | ND |
| 2020-01-29 | 0014354-01 SUVO | ND |
| 2020-01-29 | 0014356-01 SUVO | ND |
| 2020-02-18 | 0023451-01 SUVO | ND |
| 2020-02-25 | 0023651-01 SUVO | ND |
| 2020-02-26 | 0023647-01 SUVO | ND |
| 2020-02-26 | 0023652-01 SUVO | ND |
| 2020-03-13 | 0032063-01 SUVO | ND |
| 2020-04-03 | 0034347-01 SUVO | ND |
| 2020-04-06 | 0034336-01 SUVO | ND |
| 2020-04-07 | 0034328-01 SUVO | ND |
| 2020-04-07 | 0034331-01 SUVO | ND |
| 2020-04-20 | 0034338-01 SUVO | ND |
| 2020-05-07 | 0052126-01 SUVO | ND |
| 2020-07-06 | 0065288-01 SUVO | ND |
| 2020-07-06 | 0065293-01 SUVO | ND |
| 2020-07-07 | 0065286-01 SUVO | ND |
| 2020-07-07 | 0065304-01 SUVO | ND |
| 2020-07-08 | 0065295-01 SUVO | ND |
| 2020-10-05 | 0101578-01 | ND |
| 2020-10-05 | 0101589-01 SUVO | ND |
| 2020-10-08 | 0101573-01-SUVO | ND |
| 2020-10-14 | 0101580-01 VOLA | ND |
| 2020-10-15 | 0101570-01-SUVO | ND |
| 2021-01-06 | 1011282-01-SUVO | ND |
| 2021-01-07 | 1011279-01-SUVO | ND |
| 2021-01-07 | 1011289-01-SUVO | ND |
| 2021-01-07 | 1011297-01-SUVO | ND |
| 2021-01-11 | 1011287-01-SUVO | ND |
| 2021-02-05 | 1A03625-01-SUVO | ND |
| 2021-04-05 | 1D01507-01-SUVO | ND |
| 2021-04-05 | 1D01523-01-SUVO | ND |
| 2021-04-05 | 1D01557-01-SUVO | ND |
| 2021-04-20 | 1D01516-01-SUVO | ND |
| 2021-07-06 | 1F06214-01-SUVO | ND |
| 2021-07-09 | 1F06204-01 | ND |
| 2021-07-09 | 1F06206-01-SUVO | ND |
| 2021-07-09 | 1F06222-01-SUVO | ND |
| 2021-07-19 | 1F06207-01-SUVO | ND |
| 2021-10-05 | 1I05272-01-SUVO | ND |
| 2021-10-12 | 1I05290-01-SUVO | ND |
| 2021-10-27 | 1I05282-01-SUVO | ND |
| 2022-01-04 | 2A01255-01-SUVO | ND |
| 2022-01-05 | 2A01273-01-SUVO | ND |
| 2022-01-12 | 2A01292-01-SUVO | ND |
| 2022-04-04 | 2D01401-01-SUVO | ND |
| 2022-04-11 | 2D01420-01-SUVO | ND |
| 2022-04-12 | 2D01449-01-SUVO | ND |
| 2022-07-05 | 2G01271-01-SUVO | ND |
| 2022-07-05 | 2G01287-01-SUVO | ND |
| 2022-07-07 | 2G01320-01-SUVO | ND |
| 2022-07-13 | 2G01277-01-SUVO | ND |
| 2022-07-14 | 2G01291-01-SUVO | ND |
| 2022-10-04 | 2I05154-01-SUVO | ND |
| 2022-10-04 | 2I05161-01-SUVO | ND |
| 2022-10-05 | 2I05173-01-SUVO | ND |
| 2023-01-04 | 2L03917-01 SUVO | ND |
| 2023-01-04 | 2L03918-01 SUVO | ND |
| 2023-01-04 | 2L03919-01SUVO | ND |
| 2023-01-06 | 2L03916-01 SUVO | ND |
| 2023-01-06 | 2L03920-01 | ND |
| 2023-01-06 | 2L03922-01 SUVO | ND |
| 2023-01-09 | 2L03737-01 SUVO | ND |
| 2023-01-09 | 2L03739-01 SUVO | ND |
| 2023-01-09 | 2L03914-01 SUVO | ND |
| 2023-01-11 | 2L03738-01 SUVO2 | ND |
| 2023-01-11 | 2L03915-01 SUVO | ND |
| 2023-01-11 | 2L03924-01 SUVO | ND |
| 2023-01-13 | 2L03921-01 SUVO | ND |
| 2023-02-10 | 3B01417-01 SUVO | ND |
| 2023-02-10 | 3B01425-01 SUVO | ND |
| 2023-02-14 | 3B01418-01 SUVO | ND |
| 2023-02-14 | 3B01424-01 SUVO | ND |
| 2023-02-16 | 3B01420-01 SUVO | ND |
| 2023-03-14 | 3C03637-01 | ND |
| 2023-04-05 | 3D02250-01 SUVO | ND |
| 2023-04-10 | 3D02270-01 | ND |
| 2023-07-07 | 3G01504-01-SUVO | ND |
| 2023-07-07 | 3G01507-01-SUVO | ND |
| 2023-07-07 | 3G01525-01-SUVO | ND |
| 2023-07-11 | 3G01531-01-SUVO | ND |
| 2023-07-18 | 3G01514-01-SUVO | ND |
| 2023-11-27 | 3J01597-01-524 | ND |
| 2023-11-27 | 3K01326-01-524 | ND |
| 2023-12-11 | 3L01070-01 | ND |