Environmental Health

Water FAQs (Frequently Asked Questions)

Can I get a water test for my home loan or property transfer?

No, water tests cannot be requested for a home loan or property transfer purposes. We also do not test water for Transient Vacation Rental Unit licenses. 

Can I bring in my own sample?

No, a certified sampler from the office must come to the home to collect the sample. Samples can be taken from an outside faucet if no one is able to be home.

What do you test for?

A standard water analysis follows COMAR’s requirements for potable drinking water. This includes testing for pH, total coliform and E. coli bacteria, Nitrates-Nitrites, turbidity, iron, arsenic, and manganese. Lead testing is available with a doctor’s referral.

What is Total Coliform bacteria?

Total coliform is a large group of bacteria commonly found in the environment. Its presence indicates that the water supply has been contaminated by an outside source such as dirt or surface water. While total coliform does not directly cause illness, individuals with weakened immune systems should be cautious. The water should be treated by chlorination or permanent disinfection as soon as possible.

What is E. coli bacteria?

1. coli is a type of fecal coliform bacteria found in the intestinal tracts of animals. Its presence indicates fecal contamination of the water supply. While most strains of E. coli are harmless, some can cause infection in humans. There may also be other harmful pathogens from the intestinal tract that our office cannot test for. Therefore, it is advised not to drink the water if E. coli bacteria is present. The water supply should be chlorinated or permanent disinfection installed. Our office can then retest the water for bacteria at no charge before resuming consumption.

How do I chlorinate (shock) my well?

Click here for disinfection procedures.

When will I receive my results?

Routinely, bacteria test results are received in 2-3 days. You will be notified of a positive bacteria result.  Results for the metal and chemical tests can take up to 4 weeks. Once all of the results have been received, a report will be sent to the requester via email or by mail.

What does my water report mean?

Click here for how to interpret a water report.

What is the best water treatment system?

Environmental Health specialists can clarify the risks associated with your water report’s test results and outline potential treatment options. However, for personalized recommendations on the best treatment solutions for your specific water system and home, you may need to consult a water system specialist.

Do I need a Certificate of Potability?

New wells for the purpose of human consumption drilled after 1/15/2015 are required to have been issued a Certificate of Potability (COP). Environmental Health will not sign off on a Use & Occupancy permit until the COP has been issued. Water testing for new wells may begin as soon as the pressure tank has been installed and power supplied to the well pump.