Section 0400-45-01-.12 - SECONDARY DRINKING WATER REGULATIONS(1) The following maximum contaminant levels are established to provide a water that is aesthetically pleasing to the consumer. These standards will apply to all community water systems and to those non-community water systems as may be deemed necessary by the Department. Monitoring for these contaminants will be set in the Monitoring Program for each system, but in no event less than once every year for a surface and surface/ground supply and once every three years for a ground water supply. Maximum Contaminant Level
| Contaminant | Milligrams per Liter (unless otherwise indicated) |
| (a) | Chloride | 250 |
| (b) | Color | 15 (Color Units) |
| (c) | Copper | 1 |
| (d) | MBAS (Methyl Blue Active Substance) | 0.5 |
| (e) | Iron | 0.3 |
| (f) | Manganese | 0.05 |
| (g) | Odor | 3 (Threshold Odor Number) |
| (h) | pH | 6.5-8.5 |
| (i) | Sulfate | 250 |
| (j) | TDS (Total Dissolved Solids) | 500 |
| (k) | Zinc | 5 |
| (l) | Fluoride | 2 |
| (m) | Aluminum | 0.2 |
| (n) | Silver | 0.1 |
(2) The system may apply for monitoring waivers from the monitoring frequency specified in paragraph (1) of this rule. The Department may issue monitoring waivers after considering: historical data, whether or not there have been customer complaints concerning the contaminant to be waived, any corrective action taken by the water supplier to correct the secondary contaminant problem, and whether or not the system routinely monitors for the contaminant as part of its treatment process monitoring program. The Department shall determine the frequency, if any, a system must monitor after considering the historical data available, the number and nature of customer complaints and other factors that may affect the contaminant concentration, and specify the decision in writing to the system.Tenn. Comp. R. & Regs. 0400-45-01-.12
Original rule filed August 1, 2012; effective October 30, 2012. Rule was previously numbered 1200-05-01.Authority: T.C.A. §§ 68-221-701 et seq. and 4-5-201 et seq.