ADMINISTRATIVE CODE TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.7904 REPORTING AND RECORDKEEPING REQUIREMENTS
Section 611.7904 Reporting and Recordkeeping
Requirements
Suppliers required to sample must report to the Agency
according to the timeframes and provisions of Section 611.840 and retain
records according to the provisions in Section 611.860.
a) Suppliers
must report the information from initial monitoring specified in the following
table:
Section 611.7904(a) Table 1: Data
to Report from Initial Monitoring
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If you are a . . .
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You must report . . .
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Supplier monitoring for regulated PFAS under the
requirements of Section 611.7902(b)(1) on a quarterly basis.
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1. All sample results, including the locations, number
of samples taken at each location, dates, and concentrations reported.
2. Whether a trigger level, defined in Section 611.7902(a)(5),
was met or exceeded in any samples.
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Supplier monitoring for regulated PFAS under the
requirements of Section 611.7902(b)(1) less frequently than quarterly.
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1. All sample results, including the locations,
number of samples taken at each location, dates, and concentrations reported.
2. Whether a trigger level, defined in Section 611.7902(a)(5),
was met or exceeded in any samples.
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b) Suppliers
must report the information collected during the compliance monitoring period
specified in the following table:
Section 611.7904(b) Table 1: Data
to Report from Compliance Monitoring
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If you are a . . .
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You must report . . .
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Supplier monitoring for regulated PFAS under the
requirements of Section 611.7902(b)(2) on a quarterly basis.
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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 Section 611.7902(a)(5),
was met or exceeded in any samples.
4. Whether an MCL for a regulated PFAS in Section 611.311(c)
was met or exceeded in any samples.
5. Whether, based on Section 611.7903, an MCL was
violated.
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Supplier monitoring for regulated PFAS under the
requirements of Section 611.7902(b)(2) less frequently
than quarterly.
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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 Section 611.7902(a)(5),
was met or exceeded in any samples.
3. Whether an MCL for a regulated PFAS in Section
611.311(c) was met or exceeded in any samples.
4. Whether, based on Section 611.7903, an MCL was
violated (e.g., the results from a single sample are more than 4 times the
MCL).
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BOARD NOTE: This
Section derives from 40 CFR 141.904
(Source: Added at 50 Ill. Reg. 2531,
effective February 17, 2026)
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