This website provides interpretation of water test results you have received from a water testing
laboratory. Simply enter your results into the boxes below and click “Submit” at the
bottom of the page to get an interpretation of your results. If you are visiting this site and
have not had your water tested, you should arrange to have your water tested through a state certified
water testing laboratory. A list of certified labs is available from your local Penn State Cooperative
Extension office or online at http://extension.psu.edu/water/drinking-water/water-testing/testing.
For a list of recommended water tests and testing strategies, consult our water
testing fact sheet. For more information on each of the contaminants listed here, consult the U.S.
Environmental Protection Agency Safe Drinking Water web site.
- Enter numerical values - ONLY ENTER NUMBERS - DO NOT ENTER LETTERS .
- If you do not have a value for a particular parameter, leave the space blank.
- If you have a result larger than 999 do not enter commas.
- If your water test results contain either ND (not detected) or BD (below detection) enter a zero in the form for that chemical parameter.
- If your microbial test results are reported as either P (present) or A (absent), enter a
zero for A and 10 for P. If you received only presence/absence bacteria results, you might
want to consider asking the water testing laboratory to provide you with numerical results
in the future. Numerical results provide important clues to the severity and possible causes
of bacterial contamination.
- NOTE: Results reported in ppm units are equal to mg/L units; Standards in mg/L can be converted to µg/L
units by multiplying by 1,000.