I will buy a tester next week an get back to you. I just know it is great water spring fed wells dont get any better. And when using a totaly organic solution such as MOTHER EARTHS TEA from A. N. they say their is no need to ph so i did not get a tester kit. I have lived here for two years an not once have i checked the PH but the herbs speak for them selves bro. But I will check for sure just to help you out. PEACE