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GEOGRAPHIC CONCENTRATION OF CUSTOMERS (Details)	9 Months Ended
	Sep. 30, 2025 County Customers
GEOGRAPHIC CONCENTRATION OF CUSTOMERS [Abstract]
Number of counties in which water utility service provided (in County) | County	3
Large Industrial Customer [Member]
GEOGRAPHIC CONCENTRATION OF CUSTOMERS [Abstract]
Number of customers	1
Artesian Water [Member]
GEOGRAPHIC CONCENTRATION OF CUSTOMERS [Abstract]
Number of customers	98,800
Artesian Water Maryland [Member]
GEOGRAPHIC CONCENTRATION OF CUSTOMERS [Abstract]
Number of customers	2,700
Artesian Water Pennsylvania [Member]
GEOGRAPHIC CONCENTRATION OF CUSTOMERS [Abstract]
Number of customers	40
Artesian Wastewater [Member]
GEOGRAPHIC CONCENTRATION OF CUSTOMERS [Abstract]
Number of customers	9,000

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