Florida Regulations 62-550.512: Nitrate and Nitrite Monitoring Requirements
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All public water systems shall monitor to determine compliance with the maximum contaminant levels for nitrate and nitrite specified in Fl. Admin. Code R. 62-550.310(1)(a)
(1) Community or non-transient non-community water systems that are ground water systems shall monitor annually. Community or non-transient non-community water systems that are subpart H systems shall monitor quarterly.
(a) The repeat monitoring frequency for ground water systems shall be quarterly for at least one year following any one sample in which the concentration is greater than or equal to 50 percent of the maximum contaminant level. A ground water system may reduce the sampling frequency to annually after the running annual average is less than 50 percent of the maximum contaminant level.
(b) A subpart H system may reduce the sampling frequency to annually if each analytical result from the four most recent consecutive quarters is less than 50 percent of the maximum contaminant level. A subpart H system shall return to quarterly monitoring if any one sample is greater than or equal to 50 percent of the maximum contaminant level.
(c) After the initial round of quarterly sampling is completed, each system that monitors annually shall take subsequent samples during the quarter that previously resulted in the highest analytical result.
(2) Each transient non-community water system shall monitor annually. The monitoring frequency for any transient non-community water system shall be quarterly for at least one year following any one sample in which the concentration of nitrite is greater than or equal to 50 percent of the maximum contaminant level specified in Table 1, which is incorporated herein and appears at the end of this chapter. The system may return to annual monitoring when the running annual average is less than the maximum contaminant level.
(3) A system that exceeds the maximum contaminant level for nitrate or nitrite as specified in Fl. Admin. Code R. 62-550.310(1)(a), shall comply with the following:
(a) Compliance with the maximum contaminant levels for nitrate and nitrite is determined based on one sample if the levels of these contaminants are below the maximum contaminant levels. If the levels of nitrate or nitrite exceed the maximum contaminant levels in the initial sample, a confirmation sample is required to be taken within 24 hours of notification of the analytical results of the first sample. Systems unable to comply with the requirement to take a confirmation sample within 24 hours shall immediately notify the public and the Department in accordance with subsection 62-560.410(1), F.A.C. Systems exercising this option shall take and analyze a confirmation sample within two weeks of notification of the analytical results of the first sample. Compliance shall be determined based on the average of the initial and confirmation samples.
(b) If the average of the initial and confirmation samples, or the initial sample if no confirmation is taken, exceeds the maximum contaminant level, the system shall immediately notify the public pursuant to subsection 62-560.410(1), F.A.C.
(c) Systems shall notify the Department within 24 hours of determining that the maximum contaminant level has been exceeded.
(4) Compositing of samples is allowed as provided in subsection 62-550.550(4), F.A.C.
Rulemaking Authority Florida Statutes § 403.853(3), 403.861(9) FS. Law Implemented 403.853(1), (3), (7), 403.861(16), (17) FS. History-New 1-1-93, Amended 7-4-93, Formerly 17-550.512, Amended 9-7-94, 2-7-95, 8-1-00, 11-27-01, 4-14-03, 1-17-05.
(a) The repeat monitoring frequency for ground water systems shall be quarterly for at least one year following any one sample in which the concentration is greater than or equal to 50 percent of the maximum contaminant level. A ground water system may reduce the sampling frequency to annually after the running annual average is less than 50 percent of the maximum contaminant level.
(b) A subpart H system may reduce the sampling frequency to annually if each analytical result from the four most recent consecutive quarters is less than 50 percent of the maximum contaminant level. A subpart H system shall return to quarterly monitoring if any one sample is greater than or equal to 50 percent of the maximum contaminant level.
(c) After the initial round of quarterly sampling is completed, each system that monitors annually shall take subsequent samples during the quarter that previously resulted in the highest analytical result.
(2) Each transient non-community water system shall monitor annually. The monitoring frequency for any transient non-community water system shall be quarterly for at least one year following any one sample in which the concentration of nitrite is greater than or equal to 50 percent of the maximum contaminant level specified in Table 1, which is incorporated herein and appears at the end of this chapter. The system may return to annual monitoring when the running annual average is less than the maximum contaminant level.
(3) A system that exceeds the maximum contaminant level for nitrate or nitrite as specified in Fl. Admin. Code R. 62-550.310(1)(a), shall comply with the following:
(a) Compliance with the maximum contaminant levels for nitrate and nitrite is determined based on one sample if the levels of these contaminants are below the maximum contaminant levels. If the levels of nitrate or nitrite exceed the maximum contaminant levels in the initial sample, a confirmation sample is required to be taken within 24 hours of notification of the analytical results of the first sample. Systems unable to comply with the requirement to take a confirmation sample within 24 hours shall immediately notify the public and the Department in accordance with subsection 62-560.410(1), F.A.C. Systems exercising this option shall take and analyze a confirmation sample within two weeks of notification of the analytical results of the first sample. Compliance shall be determined based on the average of the initial and confirmation samples.
(b) If the average of the initial and confirmation samples, or the initial sample if no confirmation is taken, exceeds the maximum contaminant level, the system shall immediately notify the public pursuant to subsection 62-560.410(1), F.A.C.
(c) Systems shall notify the Department within 24 hours of determining that the maximum contaminant level has been exceeded.
(4) Compositing of samples is allowed as provided in subsection 62-550.550(4), F.A.C.
Rulemaking Authority Florida Statutes § 403.853(3), 403.861(9) FS. Law Implemented 403.853(1), (3), (7), 403.861(16), (17) FS. History-New 1-1-93, Amended 7-4-93, Formerly 17-550.512, Amended 9-7-94, 2-7-95, 8-1-00, 11-27-01, 4-14-03, 1-17-05.