Does a consistently low saliva ph level below 7 indicate gerd or lpr?

That is normal range: Human saliva ph ranges 6.1 to 7.4 , ph of 7 is not indicative of gerd ot LPR , ph of saliva depends on infections of mouth and salivary gland, buffering mechanisms of body, do not depend on gerd or LPR , .

Low salivary pH : Low ph means acidic environment, if your have never been diagnosed with gerd or LPR i would see your physician for some tests you very well could be.