NJDEP-Division of Water Monitoring and Standards

Links to unofficial versions of proposed and adopted rule amendments from 2002 through the present are provided in the table below. These include several amendments to upgrade waters to Category One designation. Information about obtaining an official copy of these documents as printed in the New Jersey Register is available at http://www.nj.gov/dep/legal/get_rule.htm.

Links to unofficial versions of proposed and adopted rule amendments, basis and background documents, and administrative changes from 1992 through the present are provided in the table below. Information about obtaining an official copy of these documents as printed in the New Jersey Register is available at http://www.nj.gov/dep/legal/get_rule.htm.

Interim Specific Ground Water Quality Criteria, PQLs, and GWQS for Class II Ground Water

Interim specific ground water quality criteria (ISGWQC), interim practical quantitation levels (IPQLs), and interim specific ground water quality standards (ISGWQS) were established by the Department between 2005 and 2015 for constituents not listed in Appendix Table 1 but for which sufficient information was available to determine the human health risk and derive an appropriate toxicity factor. These ISGWQC were established to assure that public health and the environment were protected in the most expeditious fashion once a concern was identified, usually in response to cleanup of a contaminated site. Interim practical quantitation levels (PQLs) were derived that represent the lowest concentration of a constituent that could be reliably achieved among certified laboratories within specified limits of precision and accuracy during routine laboratory operating conditions (i.e., the lowest quantifiable concentration). The higher of the interim ground water quality criterion and the interim PQL served as the constituent standard for each of these constituents in Class II until they were replaced with specific ground water quality standards in the adopted amendments published on January 16, 2018. All constituent standards for Class II ground water are as shown in Appendix Table 1 and Appendix Table 2 of the Ground Water Quality Standards.

Former Interim Specific Ground Water Quality Criteria, PQLs, and GWQS for Constituents in Class II Ground Water
(in micrograms per liter (μg/L), which is equivalent to parts per billion (ppb))

Constituent	CASRN	ISGWQC	IPQL	ISGWQS=Higher of PQL and ISGWQC	Effective Date	Fact Sheet	Technical Support Documents
caprolactam	105-60-2	3500	5000	5,000	2/11/08	February 2008
1-chloro-1,1-difluoroethane	75-68-3	100,000	500	100,000	11/25/15	October 2015	April 2012
cobalt	7440-48-4	100	0.5	100	2/11/08	February 2008
cresols (mixed isomers)	95-48-7 108-39-4 106-44-5	50	0.1	50	11/25/15	October 2015	February 2010
1,1-dichloro-1-fluoroethane	1717-00-6	500	30	500	11/25/15	October 2015	April 2012
dichlormid	37764-25-3	600	50	600	2/11/08	February 2008
4,6-dinitro-o-cresol	534-52-1	0.7	1	1	2/11/08	February 2008
1,4-dioxane	123-91-1	0.4	0.1	0.4	REVISED 11/25/15	REVISED October 2015	October 2010
diphenyl ether	101-84-8	100	10	100	2/11/08	February 2008
2-ethyl-1-hexanol	104-76-7	200	0.5	200	2/11/08	February 2008
hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)	121-82-4	0.3	0.5	0.5	2/11/08	February 2008
2-hexanone	591-78-6	300	1	300	2/11/08	February 2008
metolachlor	51218-45-2	100	0.5	100	2/11/08	February 2008
2-(2-methyl-4-chlorophenoxy) propionic acid (MCPP)	93-65-2	7	0.5	7	2/11/08	February 2008
2-methylnaphthalene	91-57-6	30	10	30	2/11/08	February 2008
perchlorate	14797-73-0	5	2.7	5	3/26/07	October 2005
perfluorononanoic acid (PFNA)	375-95-1	0.01	0.003	0.01	11/25/15	October 2015	June 2015
strontium	7440-24-6	1500	5	2,000	11/25/15	October 2015	April 2015
1,1,2-trichloro-1,2,2-trifluoroethane (Freon 113)	76-13-1	20,000	0.3	20,000	11/25/15	October 2015	May 2010
1,1,1-trifluoroethane	420-46-2	5000	60	5,000	11/25/15	October 2015	April 2012
2,4,6-trinitrotoluene (TNT)	118-96-7	1	0.3	1	2/11/08	February 2008
tricresyl phosphate (mixed isomers)	1330-78-5 563-04-2 78-32-0	3	0.1	3	11/25/15	October 2015	December 2010
tri-ortho-cresyl phosphate	78-30-8	3	0.1	3	11/25/15	October 2015	November 2010

Explanation of terms:

CASRN stands for Chemical Abstract Services Registry Number (Chemical Abstract Services Registry website at http://www.cas.org/content/chemical-substances/faqs#q1)
Effective date is the date that the ISGWQS became effective as a new/revised constituent standard.
Fact Sheet: This column links to a fact sheet summarizing the scientific basis for the ISGWQC, the IPQL, and the ISGWQS, using standard methods (see N.J.A.C. 7:9C-1.7(c)4 and 1.9(c))
Technical Support Documents: This column links to the technical documents (developed by the Department's Division of Science, Research and Environmental Health) that explain the scientific basis for the ISGWQC and the IPQL, as well as agency responses to public comments on any draft ISGWQCs and IPQLs published prior to being added to this table (i.e., those added since November 2015).

2012 Integrated Water Quality Monitoring and Assessment Report (Integrated Report)

2010 Integrated Water Quality Monitoring and Assessment Report (Integrated Report)

2008 Integrated Water Quality Monitoring and Assessment Report (Integrated Report)

2006 Integrated Water Quality Monitoring and Assessment Report (Integrated Report)

2004 Integrated Water Quality Monitoring and Assessment Report (Integrated Report)

2002 Integrated Water Quality Monitoring and Assessment Report (Integrated Report)

The following historic reports are also available from New Jersey's electronic digital library using the links provided: