Mystery "Pager" 153.635

[Willtheham]

I am picking up in the DC area a few tones on the frequency 153.635, It seems to happen every 3-5 minutes, sometimes higher pitch sometimes lower. If anyone knows what this is I would be happy to know. Thanks!

 

[wtp]

Call Sign/Lease ID​	Name​	FRN​	Radio Service​	Status​	Expiration Date​
1	WNRG526	POTOMAC ELECTRIC POWER CO	0002108785	IG	Active	02/05/2025
2	WPTE361	POTOMAC ELECTRIC POWER COMPANY	0002108785	IG	Active	09/10/2031

my understanding is down here it is used to control stuff to cut down on peak load,so they can turn off you AC, water heater, whatever.
ours is 153.605.
and water companies can use it also.