The pH of the water is not a measure of the strength of the acidic or basic solution and alone does not provide a full picture of the characteristics or limitations with the water supply. In general, a water with a low pH (< 6.5) could be acidic, soft, and corrosive.
Price of a Stamp. The current price of a first class stamp is 49 cents. A domestic first class letter (1 oz.) is 49 cents. The price of each additional ounce is 21 cents. It will cost you 34 cents to send a domestic postcard.
The U.S. Postal Service is lowering the price of postage stamps for the first time in 97 years, the agency announced Thursday. The price of a stamp to mail a standard letter will drop from 49 cents to 47 cents on Sunday, Fortune reported. The price of a postcard stamp will fall to 34 cents, down 1 cent. International mail will fall to $1.15 from $1.20. The change will hurt people who had collected Forever stamps, which take on the value of the current postage rate no matter how much they cost when they were purchased.