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REGULATION (Tables)
 3 Months Ended
Dec. 31, 2020
Regulated Operations [Abstract]  
Schedule of Regulator Liabilities
Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for NJNG are comprised of the following:
(Thousands)December 31,
2020		September 30,
2020
Regulatory assets-current
New Jersey Clean Energy Program$13,508 $15,570 
Conservation Incentive Program20,689 19,120 
Derivatives at fair value, net3,194 — 
Other current regulatory assets1,622 1,682 
Total current regulatory assets$39,013 $36,372 
Regulatory assets-noncurrent
Environmental remediation costs:
Expended, net of recoveries$36,892 $36,516 
Liability for future expenditures148,002 150,590 
Deferred income taxes32,406 28,241 
Derivatives at fair value, net8 1 
SAVEGREEN21,825 21,281 
Postemployment and other benefit costs184,265 188,170 
Deferred storm damage costs5,972 6,515 
Cost of removal73,237 75,080 
Other noncurrent regulatory assets17,517 20,068 
Total noncurrent regulatory assets$520,124 $526,462 
Regulatory liability-current
Overrecovered natural gas costs$16,941 $25,914 
Derivatives at fair value, net— 274 
Total current regulatory liabilities$16,941 $26,188 
Regulatory liabilities-noncurrent
Tax Act impact (1)
$194,155 $195,425 
Derivatives at fair value, net— 352 
Other noncurrent regulatory liabilities961 509 
Total noncurrent regulatory liabilities$195,116 $196,286 
(1)Reflects the re-measurement and subsequent amortization of NJNG's net deferred tax liabilities as a result of the change in federal tax rates enacted in the Tax Act.

Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for Adelphia Gateway are comprised of the following:
(Thousands)December 31,
2020		September 30,
2020
Total current regulatory assets$329 $158 
Total noncurrent regulatory assets$1,213 $997 
Total-noncurrent regulatory liabilities$166 $— 
Schedule of Regulatory Assets
Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for NJNG are comprised of the following:
(Thousands)December 31,
2020		September 30,
2020
Regulatory assets-current
New Jersey Clean Energy Program$13,508 $15,570 
Conservation Incentive Program20,689 19,120 
Derivatives at fair value, net3,194 — 
Other current regulatory assets1,622 1,682 
Total current regulatory assets$39,013 $36,372 
Regulatory assets-noncurrent
Environmental remediation costs:
Expended, net of recoveries$36,892 $36,516 
Liability for future expenditures148,002 150,590 
Deferred income taxes32,406 28,241 
Derivatives at fair value, net8 1 
SAVEGREEN21,825 21,281 
Postemployment and other benefit costs184,265 188,170 
Deferred storm damage costs5,972 6,515 
Cost of removal73,237 75,080 
Other noncurrent regulatory assets17,517 20,068 
Total noncurrent regulatory assets$520,124 $526,462 
Regulatory liability-current
Overrecovered natural gas costs$16,941 $25,914 
Derivatives at fair value, net— 274 
Total current regulatory liabilities$16,941 $26,188 
Regulatory liabilities-noncurrent
Tax Act impact (1)
$194,155 $195,425 
Derivatives at fair value, net— 352 
Other noncurrent regulatory liabilities961 509 
Total noncurrent regulatory liabilities$195,116 $196,286 
(1)Reflects the re-measurement and subsequent amortization of NJNG's net deferred tax liabilities as a result of the change in federal tax rates enacted in the Tax Act.

Regulatory assets and liabilities included on the Unaudited Condensed Consolidated Balance Sheets for Adelphia Gateway are comprised of the following:
(Thousands)December 31,
2020		September 30,
2020
Total current regulatory assets$329 $158 
Total noncurrent regulatory assets$1,213 $997 
Total-noncurrent regulatory liabilities$166 $—