35 Ill. Adm. Code 6110.611.531
Analytical Requirements
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.531 ANALYTICAL REQUIREMENTS
Section 611.531 Analytical
Requirements
A supplier must use the
analytical methods in this Section or Agency-approved alternative methods under
Section 611.480 to demonstrate compliance with only 611.Subpart B. A supplier
must measure pH, temperature, turbidity, and RDCs under the supervision of a
certified operator. A supplier must conduct measurements for total coliforms,
fecal coliforms and HPC using a certified laboratory in one of the categories
in Section 611.490(a). The supplier must perform analyses using the methods in
this Section, each incorporated by reference in Section 611.102:
a)
Basic Water Parameters and
Microbiological Quality
1) The supplier must analyze for pH and temperature using one of
the methods in Section 611.611; and
2) The supplier must analyze for total coliforms, fecal
coliforms, heterotrophic bacteria, and turbidity using specific methods and
analytical test procedures in USEPA Technical Notes, incorporated by reference
in Section 611.102:
A) Total Coliforms
BOARD NOTE:
The time from sample collection to beginning analysis for source (raw) water
samples must not exceed eight hours. The supplier should but needs not hold
samples below 10° C during transit.
i) Total
Coliform Fermentation Technique. SM 9221 A (93), SM 9221 A (94), SM 9221 A
(99), SM 9221 A (06), SM 9221 A (14), SM 9221 B (93), SM 9221 B (94), SM 9221 B
(99), SM 9221 B (06), SM 9221 B (14), SM 9221 C (93), SM 9221 C (94), SM 9221 C
(99), SM 9221 C (06), or SM 9221 C (14).
BOARD NOTE: The supplier may use
commercially available lactose broth in lieu of lauryl tryptose broth if the
supplier conducts at least 25 parallel tests between this medium and lauryl
tryptose broth using the water it normally tests, and this comparison
demonstrates that the false-positive rate and false-negative rate for total
coliforms is less than ten percent using lactose broth. If the supplier uses
inverted tubes to detect gas production, the media should cover these tubes at
least one-half to two-thirds after the supplier adds the sample. The supplier
needs not run the completed phase on ten percent of all total coliform-positive
confirmed tubes.
ii) Total Coliform Membrane Filter Technique. SM 9222 A (91), SM
9222 A (94), SM 9222 A (97), SM 9222 A (06), SM 9222 A (15), SM 9222 A (22), SM
9222 B (91), SM 9222 B (94), SM 9222 B (97), 9222 B (06), SM 9222 B (15), SM
9222 B (22), SM 9222 C (91), SM 9222 C (94), SM 9222 C (97), SM 9222 C (06), SM
9222 C (15) , or SM 9222 C (22).
iii) ONPG-MUG (also known as Colilert®). SM 9223 (92), SM 9223
(94), SM 9223 (97), SM 9223 B (04), or SM 9223 B (16).
B) Fecal Coliforms
BOARD NOTE:
The time from collecting the sample to beginning analysis of source (raw) water
samples must not exceed eight hours. The supplier should but needs not hold
samples below 10° C during transit.
i) Fecal Coliform Procedure. SM 9221 E (93), SM 9221 E (94), SM
9221 E (99), SM 9221 E (06), or SM 9221 E (14).
BOARD NOTE:
A-1 broth may be held up to seven days in a tightly closed screwcap tube at 4°
C (39° F).
BOARD
NOTE: T
he supplier may hold A-1 broth
up to seven
days in a tightly closed screwcap tube at 4
°C
(39 °F).
ii) Fecal Coliform Membrane Filter Procedure. SM 9222 D (91), SM
9222 D (94), SM 9222 D (97), SM 9222 D (06), SM 9222 D (15) , SM 9222 D (22).
C) Heterotrophic Bacteria
i) Pour Plate Method. SM 9215 B (88), SM 9215 B (94), SM 9215 B
(00), SM 9215 B (04), SM 9215 B (16) , SM 9215 B (22).
BOARD NOTE:
The time from collecting the sample to beginning analysis must not exceed eight
hours. The supplier should but needs not hold samples below 10 ºC during
transit.
ii) SimPlate
(00).
D) Turbidity
BOARD NOTE: Styrene divinyl
benzene beads (e.g.,
AMCO-AEPA-1 or equivalent) and stabilized formazin
(e.g.,
Hach StablCal™ or equivalent) are acceptable substitutes for
formazin.
i) Nephelometric
Method. SM 2130 B (88), SM 2130 B (94), SM 2130 B (01);
USEPA
180.1 (93)
; or Hach 8195 (18).
ii) GLI Method 2 (92).
iii) Laser Nephelometry. Hach 10133 (00) (FilterTrak).
iv) Laser
Nephelometry (On-Line).
Lovibond PTV 6000 (16)
,
Mitchell M5271 (09), or Mitchell M5331 (16).
v) Laser
Nephelometry (Portable). Lovibond TB 6000 (21).
vi) LED
Nephelometry (On-Line). AMI Turbiwell (09), Lovibond PTV 1000 (16), Lovibond
PTV 2000 (16), Mitchell M5331 (09), Mitchell M5331 (16) , Yokogawa 820 (22).
vii) LED
Nephelometry (Portable). Orion AQ4500 (09), Lovibond TB 3500 (21), Lovibond TB
5000 (21).
viii) 360°
Nephelometry. Hach 10258 (16) or Hach 10258 (18).
b) A supplier must measure residual disinfectant concentrations
with specific analytical methods:
1) Free Chlorine
A) Amperometric
Titration.
ASTM
D1253-03, ASTM D1253-08, ASTM D1253-14, SM 4500-Cl
D (89), SM 4500-Cl D (93), or SM 4500-Cl D (00).
B) DPD Ferrous Titrimetric. SM 4500-Cl F (89), SM 4500-Cl F (93),
or SM 4500-Cl F (00).
C) DPD
Colimetric.
Hach 10260 (13)
, SM 4500-Cl G (89), SM
4500-Cl G (93), or SM 4500-Cl G (00).
D) Syringaldazine
(FACTS). SM 4500-Cl H (89), SM 4500-Cl H (93), or SM 4500-Cl H (00).
E) On-Line
Chlorine Analyzer. USEPA 334.0 (09).
F) Amperometric
Sensor. Palintest ChloroSense (09) and
Palintest
ChloroSense (20)
.
G) Indophenol
Colorimetric. Hach 10241 (15).
2) Total Chlorine
A) Amperometric Titration.
ASTM D1253-03, ASTM D1253-08, ASTM D1253-14
,
SM
4500-Cl D (89), SM 4500-Cl D (93), or SM 4500-Cl D
(00).
B) Amperometric Titration (low level measurement). SM 4500-Cl E
(89), SM 4500-Cl E (93), or SM 4500-Cl E (00).
C) DPD Ferrous Titrimetric. SM 4500-Cl F (89), SM 4500-Cl F (93),
or SM 4500-Cl F (00).
D) DPD Colimetric. SM 4500-Cl G (89), SM 4500-Cl G (93), SM
4500-Cl G (00), or
Hach 10260 (13)
.
E) Iodometric
Electrode. SM 4500-Cl I (89), SM 4500-Cl I (93), or SM 4500-Cl I (00).
F) On-Line
Chlorine Analyzer. USEPA 334.0 (09).
G) Amperometric
Sensor. Palintest ChloroSense (09) and Palintest ChloroSense (20).
H) Indophenol Colorimetric. USEPA 127 (21).
3) Chlorine Dioxide
A) Amperometric
Titration.
SM
4500-ClO
2
C (88), SM
4500-ClO
2
C (93), SM 4500-ClO
2
C (00), SM 4500-ClO
2
E (88), SM 4500-ClO
2
E (93), or SM 4500-ClO
2
E (00).
B) DPD Method. SM 4500-ClO
2
D (88) or SM 4500-ClO
2
D (93).
C) Spectrophotometric.
USEPA 327.0 (05).
D) Amperometric
Sensor. Palintest ChlordioX Plus (13), Palintest ChlordioX Plus (20).
4) Ozone. Indigo Method. SM 4500-O
3
B (88), SM 4500-O
3
B (93), or SM 4500-O
3
B (97).
5) Alternative Test Methods. The Agency may issue a SEP allowing
a supplier to use alternative chlorine test methods:
A) DPD Colorimetric Test Kits. A supplier may measure residual
disinfectant concentrations for free chlorine and combined chlorine using ITS
Method D99-003.
B) Continuous Monitoring for Free and Total Chlorine. A supplier
may measure free and total chlorine residuals continuously by adapting a
specified chlorine residual method for use with a continuous monitoring
instrument if the chemistry, accuracy, and precision remain the same. A
supplier must calibrate instruments it uses for continuous monitoring with a
grab sample measurement at least every five days or as the Agency provides
otherwise in a SEP.
BOARD NOTE: This Section derives from 40 CFR 141.74(a) and
appendix A to subpart C of 40 CFR 141. The Board did not separately list
approved alternative methods from Standard Methods Online that are the same
version as a method appearing in a printed edition of Standard Methods. Using
the Standard Methods Online copy is acceptable.
Standard Methods
Online, Method 2130 B-01
appears in the 21
st
,
22
nd
, 23
rd
, and 24
th
editions as Method 2130
B. This appears in this Section as SM 2130 B (01).
Standard
Methods Online, Methods 4500‑Cl D-93, 4500‑Cl E-93, 4500‑Cl
F-93, 4500‑Cl G-93, 4500‑Cl H-93, and 4500‑Cl I-93
appear
in the 19
th
and 20
th
editions as Methods 4500‑Cl D,
4500‑Cl E, 4500‑Cl F, 4500‑Cl G, 4500‑Cl H, and 4500‑Cl
I. These appear in this Section as SM 4500‑Cl D (93), SM 4500‑Cl E
(93), SM 4500‑Cl F (93), SM 4500‑Cl G (93), SM 4500‑Cl H
(93), and SM 4500‑Cl I (93).
Standard
Methods Online, Methods 4500‑Cl D-00, 4500‑Cl E-00, 4500‑Cl
F-00, 4500‑Cl G-00, 4500‑Cl H-00, and 4500‑Cl I-00
appear
in the 21
st
, 22
nd
, 23
rd
, and 24
th
editions
as Methods 4500‑Cl D, 4500‑Cl E, 4500‑Cl F, 4500‑Cl G,
4500‑Cl H, and 4500‑Cl I. These appear in this Section as SM 4500‑Cl
D (00), SM 4500‑Cl E (00), SM 4500‑Cl F (00), SM 4500‑Cl G
(00), SM 4500‑Cl H (00), and SM 4500‑Cl I (00).
Standard
Methods Online, Methods 4500‑ClO
2
C-93, 4500‑ClO
2
D-93, and 4500‑ClO
2
E-93
appear in the 19
th
and
20
th
editions as Methods 4500‑ClO
2
C, 4500‑ClO
2
D, and 4500‑ClO
2
E. These appear in this Section as SM 4500‑ClO
2
C (93), SM 4500‑ClO
2
D (93), and SM 4500‑ClO
2
E (93).
Standard
Methods Online, Methods 4500‑ClO
2
C-00 and 4500‑ClO
2
E-00 appear in the 19
th
, 20
th
, 21
st
, 22
nd
,
23
rd
, and 24
th
editions as Methods 4500‑ClO
2
C and 4500‑ClO
2
E. These appear in this Section as SM 4500‑ClO
2
C (00) and SM 4500‑ClO
2
E (00).
Standard
Methods Online, Method 4500‑O
3
B-9
7 appears in the 20
th
,
21
st
, 22
nd
, 23
rd
, and 24th editions as Method
4500‑O
3
B. This appears in this Section as SM 4500‑O
3
B (97).
Standard Methods Online, Method
9215 B-00 appears in the 21
st
edition as Method 9215 B. This
appears in this Section as SM 9215 B (00).
Standard Methods Online, Method 9215 B-04
appears in the
22
nd
edition as Method 9215 B. This appears in this Section as SM
9215 B (04).
Standard Methods Online, Methods
9221 A-99, 9221 B-99, and 9221 C-99 appear in the 21
st
edition as
Methods 9221 A, 9221 B, and 9221 C. These appear in this Section as SM 9221 A
(99), SM 9221 B (99), and SM 9221 C (99).
Standard Methods Online, Methods
9221 A-06, 9221 B-06, 9221 C-06, and 9221 E-06 appear in the 22
nd
edition as Methods 9221 A, 9221 B, 9221 C, and 9221 E. These appear in this
Section as SM 9221 A (06), SM 9221 B (06), SM 9221 C (06), and SM 9221 E (06).
Standard
Methods Online, Methods 9222 A-97, 9222 B-97, and 9222 C-97 appear in the 20
th
and 21
st
editions as Methods 9222 A, 9222 B, and 9222 C. These
appear in this Section as SM 9222 A (97), SM 9222 B (97), and SM 9222 C (97).
Standard Methods Online, Method
9223 B-97 appears in the 20
th
and 21
st
editions as Method
9223 B. This appears in this Section as SM 9223 B (97).
Standard
Methods Online, Method 9223 B-04
appears in the 22
nd
edition as
Method 9223 B. This appears in this Section as SM 9223 B (04).