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§141.904 Reporting and recordkeeping requirements.

RegSenseSafe Drinking WaterCFR RegulationsWater QualityWater ProgramsEnvironmental Protection Agency (EPA)EnvironmentalWater QualityCFR SectionEnglishFocus AreaUSA

Systems required to sample must report to the State according to the timeframes and provisions of §141.31 and retain records according to the provisions in §141.33.

(a) Systems must report the information from initial monitoring specified in the following table:

Table 1 to Paragraph (a)—Data To Report From Initial Monitoring
If you are a . . .You must report . . .
System monitoring for regulated PFAS under the requirements of §141.902(b)(1) on a quarterly basis1. All sample results, including the locations, number of samples taken at each location, dates, and concentrations reported. 2. Whether a trigger level, defined in §141.902(a)(5), was met or exceeded in any samples.
System monitoring for regulated PFAS under the requirements of §141.902(b)(1) less frequently than quarterly1. All sample results, including the locations, number of samples taken at each location, dates, and concentrations reported. 2. Whether a trigger level, defined in §141.902(a)(5), was met or exceeded in any samples.

(b) Systems must report the information collected during the compliance monitoring period specified in the following table:

Table 2 to Paragraph (b)—Data To Report From Compliance Monitoring
If you are a . . .You must report . . .
System monitoring for regulated PFAS under the requirements of §141.902(b)(2) on a quarterly basis
  1. All sample results, including the locations, number of samples taken at each location, dates, and concentrations during the previous quarter.
  2. The running annual average at each sampling point of all compliance samples.
  3. Whether a trigger level, defined in §141.902(a)(5), was met or exceeded in any samples.
  4. Whether an MCL for a regulated PFAS in §141.61(c) was met or exceeded in any samples. 5. Whether, based on §141.903, an MCL was violated.
System monitoring for regulated PFAS under the requirements of §141.902(b)(2) less frequently than quarterly
  1. All sample results, including the locations, number of samples taken at each location, dates, and concentrations during the previous monitoring period.
  2. Whether a trigger level, defined in §141.902(a)(5), was met or exceeded in any samples.
  3. Whether an MCL for a regulated PFAS in §141.61(c) was met or exceeded in any samples.
  4. Whether, based on §141.903, an MCL was violated (e.g., the results from a single sample are more than 4 times the MCL).

[89 FR 32750, Apr. 26, 2024]

['Water Programs']
['Safe Drinking Water', 'Water Quality']
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