Western Australia Iron Ore (WAIO)

Quarterly Drinking

Water Quality Report -

Newman WL53

Operating Area

Jan - Mar 2024

30 April 2024

Contents

1

Water Provider Information

3

2

Performance Summary

4

3

Microbial Performance

5

3.1

Microbiological - Compliance Summary

5

3.2

Microbiological - Exception Notification

6

3.3

Microbiological - Incident Specific Information

6

4

Chemical - Health Related Performance

7

4.1

Chemical - Health Related - Compliance Summary

7

4.2

Chemical - Health Related - Exception Notifications

9

4.3

Chemical - Health Related - Incident Specific Information

9

5

Chemical - Aesthetic Performance

10

5.1

Chemical - Aesthetic - Compliance Summary

10

6

Radiological Performance

11

6.1

Radiological - Compliance Summary

11

6.2

Radiological - Exception Notifications

11

6.3

Radiological - Incident Specific Information

11

7

Planned Sample Summary

12

7.1

Planned Sample - Compliance Summary

12

7.2

Planned Sample - Exceptions

12

8

General Notes/Other News

13

Water Provider Information

BHP

1 Water Provider Information

Water Provider Contact Details

Name of Company

BHP Western Australia Iron Ore

Company Address

PO Box 7122 Cloisters Square Perth WA 6850

General Manager NPI

K. Holling

DoH Liaison Officer

N. Morris

Customer Enquiries

1800 421 077

Newman WL53 Operating Area Jan - Mar 2024

3

Performance Summary

BHP

2 Performance Summary

Water Quality Meeting the Australian Drinking Water Guidelines v3.7 2022

Newman Water Treatment Plant

Number of Samples

Number of Samples

Number of

Non-Conformances

Assessed

Within Guidelines

to Guidelines

Microbiological

E. coli

13

13

0

Amoeba (Thermophilic Naegleria)

13

13

0

Chemical

Chemical - Health

47

47

0

Chemical - Aesthetic

31

31

0

Radiological

0

0

0

Newman Mine Services Industrial Area

Number of Samples

Number of Samples

Number of

Non-Conformances

Assessed

Within Guidelines

to Guidelines

Microbiological

E. coli

3

3

0

Amoeba (Thermophilic Naegleria)

3

3

0

Chemical

Chemical - Health

3

3

0

Chemical - Aesthetic

6

6

0

Radiological

0

0

0

Newman North West Area

Number of Samples

Number of Samples

Number of

Non-Conformances

Assessed

Within Guidelines

to Guidelines

Microbiological

E. coli

3

3

0

Amoeba (Thermophilic Naegleria)

3

3

0

Chemical

Chemical - Health

3

3

0

Chemical - Aesthetic

6

6

0

Radiological

0

0

0

Newman WL53 Operating Area Jan - Mar 2024

4

Microbial Performance

BHP

3 Microbial Performance

3.1 Microbiological - Compliance Summary

Newman Water Treatment Plant

Compliance

Number of

Number of

Compliance

Microbiological Parameter

Compliant

Criteria

samples

%

Samples

Bacterial

E. coli

Non-Detect

13

13

100

Amoeba

Thermophilic Naegleria

Non-Detect

13

13

100

Newman Mine Services Industrial Area

Compliance

Number of

Number of

Compliance

Microbiological Parameter

Compliant

Criteria

samples

%

Samples

Bacterial

E. coli

Non-Detect

3

3

100

Amoeba

Thermophilic Naegleria

Non-Detect

3

3

100

Newman North West Area

Compliance

Number of

Number of

Compliance

Microbiological Parameter

Compliant

Criteria

samples

%

Samples

Bacterial

E. coli

Non-Detect

3

3

100

Amoeba

Thermophilic Naegleria

Non-Detect

3

3

100

Newman WL53 Operating Area Jan - Mar 2024

5

Microbial Performance

BHP

3.2 Microbiological - Exception Notification

Microbiological Water Quality Exceptions

Population

Date

Microbiological

Alert

Date DoH

Close Out

Locality

Result

served

Parameter

Level

Notified

Date

Notified

3.3 Microbiological - Incident Specific Information

No exception notifications recorded Quarter 1 2024.

Newman WL53 Operating Area Jan - Mar 2024

6

Chemical - Health Related Performance

BHP

4 Chemical - Health Related Performance

4.1 Chemical - Health Related - Compliance Summary

Newman Water Treatment Plant

ADWG

Number

Number

Parameter

Units

Health-

of

of

Compliance

Maximum

Related

Samples

Compliant

%

Value

Guideline

Assessed

Samples

Free Chlorine

mg/L

5

13

13

100

1.4

Arsenic

mg/L

0.01

3

3

100

<0.001

Benzene

mg/L

0.001

1

1

100

<0.0005

Bromate

mg/L

0.02

1

1

100

<0.005

Cadmium

mg/L

0.002

1

1

100

<0.0001

Chlorite

mg/L

0.8

1

1

100

<0.05

Chromium (as Cr VI)

mg/L

0.05

1

1

100

<0.001

Ethylbenzene

mg/L

0.3

1

1

100

<0.0005

Lead

mg/L

0.01

1

1

100

<0.001

Mercury

mg/L

0.001

1

1

100

<0.00005

Nickel

mg/L

0.02

1

1

100

<0.001

Nitrilotriacetic acid

mg/L

0.2

1

1

100

<0.01

Polycyclic aromatic hydrocarbons

mg/L

0.00001

1

1

100

<0.000005

(Benzo-(a)-pyrene)

Perfluorooctanoic Acid (PFOA)

µg/L

0.56

1

1

100

<0.0005

Sum of Perfluorooctane sulfonate

(PFOS) and Perfluorohexane

µg/L

0.07

1

1

100

<0.0002

sulfonate (PFHxS)

Toluene

mg/L

0.8

1

1

100

<0.0005

Uranium

mg/L

0.02

3

3

100

0.003

Xylene

mg/L

0.6

1

1

100

<0.001

Newman Water Treatment Plant

ADWG

Number

Number

Parameter

Units

Health-

of

of

Compliance

Maximum

Related

Samples

Compliant

%

Value

Guideline

Assessed

Samples

Fluoride

mg/L

1.5

13

13

100

0.8

Note: As of October 2023, fluoridated water is supplied to Newman WL53 Operating Area. See DoH media release (Fluoridated drinking water in Newman set to combat tooth decay (health.wa.gov.au)).

Newman Mine Services Industrial Area

ADWG

Number

Number

Parameter

Units

Health-

of

of

Compliance

Maximum

Related

Samples

Compliant

%

Value

Guideline

Assessed

Samples

Free Chlorine

mg/L

5

3

3

100

1.3

Newman WL53 Operating Area Jan - Mar 2024

7

Chemical - Health Related Performance

BHP

Newman North West Area

ADWG

Number

Number

Parameter

Units

Health-

of

of

Compliance

Maximum

Related

Samples

Compliant

%

Value

Guideline

Assessed

Samples

Free Chlorine

mg/L

5

3

3

100

1.6

Note: Chlorine (as Free Chlorine residual) measured by field test instrument.

Chemical Health results other than chlorine for Mine Services Industrial Area and North West Area are represented by Newman Water Treatment Plant data.

Newman WL53 Operating Area Jan - Mar 2024

8

Chemical - Health Related Performance

BHP

4.2 Chemical - Health Related - Exception Notifications

Health Related Chemical Water Quality Exceptions

Locality

Population

served

Date

Result

Notified

Health Related

Chemical

Characteristic

Alert Level

Date DoH

Close Out

Notified

Date

4.3 Chemical - Health Related - Incident Specific Information

No exception notifications recorded Quarter 1 2024.

Newman WL53 Operating Area Jan - Mar 2024

9

Chemical - Aesthetic Performance

BHP

5 Chemical - Aesthetic Performance

5.1 Chemical - Aesthetic - Compliance Summary

Newman Water Treatment Plant

ADWG

Number of

Number of

Aesthetic-

Compliance

Maximum

Parameter

Units

Samples

Compliant

Related

%

Value

Assessed

Samples

Guideline

pH

6.5-8.5

13

13

100

7.2

Turbidity

NTU

5

13

13

100

0.1

Chloride

mg/L

250

1

1

100

75

Hardness

mg/L

200

1

1

100

140

(as Calcium carbonate)

Iron

mg/L

0.3

1

1

100

<0.005

Silica

mg/L

80

1

1

100

16

Total dissolved solids

mg/L

600

1

1

100

310

Newman Mine Services Industrial Area

ADWG

Number of

Number of

Aesthetic-

Compliance

Maximum

Parameter

Units

Samples

Compliant

Related

%

Value

Assessed

Samples

Guideline

pH

6.5 - 8.5

3

3

100

7.4

Turbidity

NTU

5

3

3

100

0.2

Newman North West Area

ADWG

Number of

Number of

Aesthetic-

Compliance

Maximum

Parameter

Units

Samples

Compliant

Related

%

Value

Assessed

Samples

Guideline

pH

6.5 - 8.5

3

3

100

7.2

Turbidity

NTU

5

3

3

100

<0.1

Note: pH and Turbidity measured by field test instrument.

Chemical Aesthetic results other than pH and turbidity for Mine Services Industrial Area and North West Area are represented by Newman Water Treatment Plant data.

To ensure effective disinfection and maintain microbial safety of drinking water throughout the system, BHPIO has made an operating decision to maintain chlorine levels above the ADWG aesthetic guideline value of 0.6 milligrams per litre.

Newman WL53 Operating Area Jan - Mar 2024

10

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Disclaimer

BHP Group Limited published this content on 09 May 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 09 May 2024 05:22:03 UTC.