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Adding different amounts of contaminated water to each tube rather than diluting between tubes. Frequently, county health agencies will assist you with nitrate or bacteria testing. If not, you can ask a state-approved laboratory to test your water. Call the Safe Drinking Water Hotline at 800-426-4791 to locate one in your region.
Tests of the water's quality will reveal information on the condition of the river. The quality of the water might fluctuate over time, and this can be noticed by testing tubes it repeatedly. Temperature, pH, turbidity, salinity, nitrates, and phosphates are just a few of the variables that can be measured.
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