Missouri DNR Water Quality Report Consumer Confidence
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ST Louis City and County Missouri
ST Charles County Missouri
Lincoln County Missouri
Washington County Missouri
WASHINGTON COUNTY PWSD 1
220 ppm → 12.9 gpg
276  ppm → 16.1 gpg
286 ppm → 16.7 gpg
303 ppm → 17.7 gpg
303 ppm → 17.7 gpg
286 ppm → 16.7 gpg
396 ppm → 23.2  gpg
243 ppm → 14.2 gpg
286 ppm → 16.7 gpg
100-170  ppm → 6–10 gpg
285 ppm → 16.7 gpg
76–180 ppm → 4–10 gpg
1421-184  ppm → 8.3-10.8 gpg
152 ppm → 8.9 gpg
275 ppm → 16.1 gpg
173 ppm → 10.1 gpg
267 ppm → 15.6 gpg
296 ppm → 17.3 gpg
317 ppm → 17.1 gpg
317 ppm → 17.1 gpg
270-297ppm → 15.8-17.4 gpg
236-274 ppm → 13.8-16  gpg
216 ppm → 5.7 gpg
88 ppm → 9.8 gpg
128 ppm → 7.5 gpg
129-332  ppm → 7.5 19.4  gpg
274 ppm → 16 gpg
Jefferson County Missouri
Soft: 0-60 mg/L or 0-3.5 grains per gallon (gpg).
Moderately hard: 61-120 mg/L or 3.5-7 gpg.
Hard: 121-180 mg/L or 7-10.5 gpg.
Very hard: Over 180 mg/L or over 10.5 gpg.
Extremely hard: Over 15 gpg.