Ohio Admin. Code 3745-81-11 - Maximum contaminant levels and best available technologies for inorganic contaminants
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Nitrate (as nitrogen) |
10 |
Nitrite (as nitrogen) |
1 |
Total nitrate and nitrite (as nitrogen) |
10 |
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Antimony |
0.006 |
Arsenic |
0.010 |
Asbestos |
7a |
Barium |
2 |
Beryllium |
0.004 |
Cadmium |
0.005 |
Chromium |
0.1 |
Cyanide (as free cyanide) |
0.2 |
Fluoride |
4.0 |
Mercury |
0.002 |
Selenium |
0.05 |
Thallium |
0.002 |
a. In units of millions of fibers per liter, where only fibers longer than ten micrometers are counted. |
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Bromate |
0.010 |
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Chlorite |
1.0 |
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Antimony |
2,7 |
Arsenica |
1, 2, 5, 6, 7, 9, 12b |
Asbestos |
2, 3, 8 |
Barium |
5, 6, 7, 9 |
Beryllium |
1, 2, 5, 6, 7 |
Bromate |
14 |
Cadmium |
2, 5, 6, 7 |
Chlorite |
15 |
Chromium |
2, 5, 6c, |
Cyanide |
5, 7, 13 |
Mercury |
2d, 4, 6d, 7d |
Nitrate |
5, 7, 9 |
Nitrite |
5, 7 |
Selenium |
1, 2e, 6, 7, 9 |
Thallium |
1, 5 |
a. BATs for arsenic (V). Pre-oxidation may be required to convert arsenic (III) to arsenic (V) |
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b. To obtain high removals the iron to arsenic ratio must be at least 20:1 |
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c. |
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d. |
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e. |
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Key to BATs in table: |
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1 = Activated alumina |
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2 = |
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3 = |
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4 = Granular activated carbon |
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5 = Ion exchange |
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6 = Lime softening (not |
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7 = Reverse osmosis |
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8 = Corrosion control |
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9 = Electrodialysis |
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10 = Chlorine |
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11 = Ultraviolet |
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12 = Oxidation/ |
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13 = Alkaline chlorination (pH [GREATER THAN]8.5) |
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14 = Control of ozone treatment process to reduce production of bromate |
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15 = Control of treatment processes to reduce
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Notes
Promulgated Under: 119.03
Statutory Authority: 6109.03, 6109.04
Rule Amplifies: 6109.04
Prior Effective Dates: 12/27/1978, 03/01/1988, 09/13/1993, 01/01/2002, 08/01/2005, 02/22/2010
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.