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Proposed Rule

Water Quality Standards To Protect Aquatic Life in the Delaware River

In Plain English

What is this Federal Register notice?

This is a proposed rule published in the Federal Register by Environmental Protection Agency. Proposed rules invite public comment before becoming final, legally binding regulations.

Is this rule final?

No. This is a proposed rule. It has not yet been finalized and is subject to revision based on public comments.

Who does this apply to?

Consult the full text of this document for specific applicability provisions. The affected parties depend on the regulatory scope defined within.

When does it take effect?

No specific effective date is indicated. Check the full text for date provisions.

📋 Rulemaking Status

This is a proposed rule. A final rule may be issued after the comment period and agency review.

Regulatory History — 2 documents in this rulemaking

  1. Jan 8, 2024 C1-2023-27758 Proposed Rule
    Water Quality Standards To Protect Aquatic Life in the Delaware River
  2. Sep 29, 2025 2025-18816 Final Rule
    Water Quality Standards To Protect Aquatic Life in the Delaware River

Document Details

Document NumberC1-2023-27758
TypeProposed Rule
PublishedJan 8, 2024
Effective Date-
RIN2040-AG30
Docket IDEPA-HQ-OW-2023-0222
Text FetchedYes

Agencies & CFR References

CFR References:

Linked CFR Parts

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TypeProposedFinalMethodConf
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Related Documents (by RIN/Docket)

Doc #TypeTitlePublished
2025-18816 Final Rule Water Quality Standards To Protect Aquat... Sep 29, 2025

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Full Document Text (237 words · ~2 min read)

Text Preserved
ENVIRONMENTAL PROTECTION AGENCY <CFR>40 CFR Part 131</CFR> <DEPDOC>[EPA-HQ-OW-2023-0222; FRL 10760-01-OW]</DEPDOC> <RIN>RIN 2040-AG30</RIN> <SUBJECT>Water Quality Standards To Protect Aquatic Life in the Delaware River</SUBJECT> <HD SOURCE="HD2">Correction</HD> In proposed rule document 2023-27758, appearing on pages 88315-88336 in the issue of Thursday, December 21, 2023, make the following correction: On page 88326, in the table titled “Table 7: Alternative 1: Dissolved Oxygen Criteria Expressed as Concentration (mg/L)”, the table is corrected to appear as set forth below: <GPOTABLE COLS="5" OPTS="L2,nj,i1" CDEF="s75,12,12,r50,r50"> <TTITLE>Table 7—Alternative 1: Dissolved Oxygen Criteria Expressed as Concentration </TTITLE> [mg/L] <CHED H="1">Season</CHED> <ENT>* 23.3 (14.7)</ENT> <ENT>* 5.6 (6.7)</ENT> <ENT>Daily Average</ENT> <ENT> 10% <E T="03">(12 Days Cumulative)</E> . </ENT> </ROW> <ROW> <ENT I="01"> Juvenile Development <E T="03">(July 1-October 31)</E> <ENT>5.4</ENT> <ENT>Daily Average</ENT> <ENT> 10% <E T="03">(12 Days Cumulative)</E> . </ENT> </ROW> <ROW> <ENT I="22"> </ENT> <ENT>6.1</ENT> <ENT>Daily Average</ENT> <ENT> 50% <E T="03">(61 Days Cumulative)</E> <E T="03">(November 1-February 28/29)</E> </ENT> <ENT>* 12.4 (5.6)</ENT> <ENT>* 7.0 (8.3)</ENT> <ENT>Daily Average</ENT> <ENT> 10% <E T="03">(12 Days Cumulative)</E> . </ENT> </ROW> <TNOTE> <SU>*</SU>  The 90th percentile of seasonal water temperature and corresponding criterion is used for the main estimate, while the average water temperature and corresponding criterion is shown in parentheses. </TNOTE> <TNOTE> <SU>+</SU>  Water temperature is not applicable during the <E T="03">Juvenile Development</E> season because the criteria magnitudes are derived from the EPA's Atlantic Sturgeon cohort model, described in section IV.C.1 of this preamble. </TNOTE> </GPOTABLE> <FRDOC>[FR Doc. C1-2023-27758 Filed 1-5-24; 8:45 am]</FRDOC>
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