The City of Ferndale recently published the annual water quality report (PDF) detailing results of tap water sample analyses. For some substances results are from samples over the past year and while others are based on a single annual sample.
According to the city website,
All water purveyors are required to publish an annual Consumer Confidence Report which outlines important information about the drinking water they provide to their customers.
Contained in the recently released 2016 report is a table detailing the presence of various substances in the samples. Included in that data is the following:
| Substance | Amount/Range Detected |
Maximum Level |
| Arsenic | 0.002 ppm | 0.01 ppm |
| Barium | 0.041 ppm | 2 ppm |
| Chlorine | 0.5 to 0.9 ppm (avg 0.7) | 4 ppm |
| Copper | 0.035 ppm | 1.3 ppm |
| Lead | 0 to 0.003 ppm | 0.015 ppm |
| Total Coliform | 1 positive sample (of 176 taken) | 1 positive sample |
| Nitrate | 0 positive of 1 sample | 10 ppm |
| Haloacetic Acids | 2.4 to 5.6 ppb (avg 3.5) | 60 ppb |
| Total Trihalomethanes | 9.2 to 39.6 ppb (avg 19.2) | 80 ppb |
Comparing the 2016 data with 2014 and 2015 data,
| Substance | 2014 Amt/Range Detected | 2015 Amt/Range Detected | 2016 Amt/Range Detected |
| Arsenic | not reported | 0.002 ppm | 0.002 ppm |
| Barium | not reported | 0.039 ppm | 0.041 ppm |
| Chlorine | 0.4 to 1.0 ppm | 0.6 to 0.8 ppm | 0.5 to 0.9 ppm |
| Copper | 0 to 0.194 ppm | 0 to 0.134 ppm | 0 to 0.134 ppm |
| Lead | 0 to 0.016 ppm | 0 to 0.003 ppm | 0 to 0.003 ppm |
| Total Coliform | 0 positive samples of 132 | 0 positive samples of 132 | 1 positive sample of 176 |
| Nitrate | 0 positive of 1 sample | 0 positive of 1 sample | 0 positive of 1 sample |
| Haloacetic Acids | 4.9 to 12.1 ppb | 2.1 to 7.9 ppb | 2.4 to 5.6 ppb |
| Total Trihalomethanes | 39.5 to 77.0 ppb | 11.3 to 44.8 ppb | 9.2 to 39.6 ppb |
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