GEOGRAPHIC CONCENTRATION OF CUSTOMERS (Details)	6 Months Ended
	Jun. 30, 2021 Customer County
Concentration Risks [Abstract]
Number of counties in which water utility service provided | County	3
Large Industrial Customer [Member]
Concentration Risks [Abstract]
Number of customers	1
Artesian Water [Member]
Concentration Risks [Abstract]
Number of customers	90,900
Artesian Water Maryland [Member]
Concentration Risks [Abstract]
Number of customers	2,500
Artesian Water Pennsylvania [Member]
Concentration Risks [Abstract]
Number of customers	40
Artesian Wastewater [Member]
Concentration Risks [Abstract]
Number of customers	3,000