Bacteriological Sample Collection
Tutorial for the Collection of Bacteriological Water Samples -- Applicable to samples collected for Total Coliform Rule (TCR) and Revised Total Coliform Rule (RTCR) Compliance Monitoring

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Welcome to the video guide to taking a Bacteriological Water Sample.

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We'll cover sample collection, how to complete the sample sheet,

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and how to ship your samples.

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Before you begin taking samples, you need to choose a suitable tap.

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Some taps you should avoid.

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[Avoid sinks with dirty dishes...]

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[Dirty rags]

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[Point of use devices]

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[Avoid water fountains and outdoor taps if possible]

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[Avoid bathroom taps]

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Swivel taps are OK as long as you don't swivel them 

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while you're taking your sample.

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Aerators can harbor bacteria and should be removed before taking your sample.

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Let the water flow for about 5 minutes to make sure you get water from the main and

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then adjust the flow so it's nice and even.

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[pencil thin stream] Now it's time to take your sample.

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[Measure residual chlorine if required]

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[Do not rinse out the essential reagents]

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Next, you'll be completing the sample

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information sheet.

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This is how the lab tracks where you took your samples.

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The section regarding sample type can be a little tricky.

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Routine samples are the samples you take every month.

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Repeat samples are the samples you take after you get a positive result.

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The rest of the form is pretty self-explanatory.

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[Infographic: The lab needs to receive and process samples within

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30 hours. Find the closest lab to your site, by shipping time. ]

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Now it's time to ship your samples to the lab.

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[Info graphic: You are responsible for ensuring that the lab received and
processed your samples]

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For a List of North Dakota EPA Certified Labs (Drinking Water Only), see the
ND DEQ website: https://deq.nd.gov/MF/DWP/RTCRSampling.aspx#List-of-North-Dakota-EPA-Certified-Labs

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For more information, contact Bryce Peters: bpeters@nd. gov