# 35 Ill. Adm. Code 6110.611.606: Section 611.606 Confirmation Samples

> Illinois · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_606

## Section

- **Citation:** 35 Ill. Adm. Code 6110.611.606
- **Heading:** Section 611.606 Confirmation Samples
- **Jurisdiction:** Illinois
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Illinois Administrative Code / Title 35  /  / Part 6110  / Section 611.606 Confirmation Samples

## Text

Section 611
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.606 CONFIRMATION SAMPLES
Section 611.606  Confirmation
Samples
a)         If the results of sampling for antimony, arsenic, asbestos,
barium, beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel,
selenium, or thallium indicate a level in excess of the MCL, the supplier must
collect one additional sample as soon as possible after the initial sample was
taken (but not to exceed two weeks) at the same sampling point.
b)         If nitrate or nitrite sampling results indicate a level in
excess of the MCL, the supplier must take a confirmation sample within 24 hours
after the supplier's receipt of notification of the analytical results of the
first sample.
1)         Suppliers unable to comply with the 24-hour sampling
requirement must immediately notify the persons served in compliance with
Section 611.902 and meet other Tier 1 public notification requirements under
Subpart V of this Part.
2)         Suppliers exercising this option must take and analyze a
confirmation sample within two weeks after notification of the analytical
results of the first sample.
c)         Averaging rules are specified in Section 611.609.  The Agency
must delete the original or confirmation sample if it determines that a
sampling error occurred, in which case the confirmation sample will replace the
original sample.
BOARD NOTE:
Derived from 40 CFR 141.23(f).

## Nearby sections

- [35 Ill. Adm. Code 6110.611.601 Section 611.601  Monitoring Frequency](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_601.md)
- [35 Ill. Adm. Code 6110.611.602 Section 611.602  Asbestos Monitoring Frequency](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_602.md)
- [35 Ill. Adm. Code 6110.611.603 Section 611.603  Inorganic Monitoring Frequency](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_603.md)
- [35 Ill. Adm. Code 6110.611.606 Section 611.606  Confirmation Samples](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_606.md)
- [35 Ill. Adm. Code 6110.611.607 Section 611.607  More Frequent Monitoring and Confirmation Sampling](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_607.md)
- [35 Ill. Adm. Code 6110.611.608 Section 611.608  Additional Optional Monitoring](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_608.md)
- [35 Ill. Adm. Code 6110.611.609 Section 611.609  Determining Compliance](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_609.md)
- [35 Ill. Adm. Code 6110.611.611 Section 611.611  Inorganic Analysis](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_611.md)
- [35 Ill. Adm. Code 6110.611.612 Section 611.612  Monitoring Requirements for Old Inorganic MCLs](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_612.md)
- [35 Ill. Adm. Code 6110.611.631 Section 611.631  Special Monitoring for Inorganic Chemicals (Repealed)](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_631.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P6110_S611_606. Check the current official text before relying on it. Not legal advice.