Coldwater 517-279-9561

Hillsdale 517-437-7395

Three Rivers 269-273-2161

Partial Chemical Analysis

The Michigan Department of Public Health laboratory analyzes drinking water for eight parameters in a routine testing procedure referred to as a partial chemical analysis. Below is a table of these parameters and associated problems.  Except for fluoride and nitrate, the levels listed below are general guidelines. State drinking water standards have been established and are listed for these two chemicals.

Test Excellent Satisfactory Objectionable Problem
Iron 0-0.2 0.2-0.5 Over 0.5 Staining, turbidity taste, odor
Sodium 0-20 20-160 Over 160 Taste, special diets may require water of low sodium content
Nitrate (NO3) 0 1-10 Over 10 (State drinking water standard is 10) Nitrate poisoning-especially infaNitrate/td>
Nitrite 0 0-1 Over 1 Nitrite poisoning-especially infants
Hardness (CaCo3) 25-100 100-250 Over 250 or less than 25 Scaling of water fixtures, soap scum at high levels; corrosion at low levels
Sulfate 0-50 50-250 Over 250 Laxative effect, odor, scaling in boilers, heat exchangers
Chloride 0-20 20-250 Over 250 Taste; corrosion



0.7-2.0 or 1.7-2.4

Over 4.0 (State drinking water standard is 4)

Low levels are beneficial in preventing tooth decay. High levels may cause mottling of teeth


Test results are reported in milligrams per liter (mg/l) for all parameters.