As the Sydney heatwave last week demonstrated, power outages in NSW are becoming an increasingly urgent issue. With multiple coal-fired power plants set to close or undergo maintenance, NSW is bracing for a record number of blackouts in 2025 – a challenge that extends beyond just an inconvenience, but a serious risk to safety and productivity for residents and businesses alike.
A new report by PSS Distributors, NSW's Blackout Hotspots Revealed – Causes and Impacts, uncovers the Local Government Areas (LGAs) across the state most vulnerable to power disruptions. The report explores data for 34 LGAs across NSW and unveils the blackspots where outages strike most frequently and linger the longest, using information from April 2023 to March 2024 outage data from Ausgrid – Australia's largest electricity distributor on the east coast.
Hunter's Hill is the most affected, with an average of 1,290 customers interrupted, followed by Lake Macquarie (834), Lane Cove (769), Ryde (754) and the Central Coast (753). Meanwhile, residents in the Lower North Shore endure the longest disruptions, lasting over six hours, on average.
The report also highlights environmental factors, equipment faults and third-party incidents such as maintenance work as the leading causes of these blackouts, which disrupt homes and businesses alike. Areas like the Northern Beaches, Lane Cove and Ryde experience compounded impacts due to multiple contributing factors.
Top NSW LGAs by Average Number of Customers Interrupted
| No. | LGA | Avg Customer Interruptions | Average Duration (Mins) |
| 1 | Hunter's Hill | 1290 | 126 |
| 2 | Lake Macquarie | 834 | 168 |
| 3 | Lane Cove | 769 | 116 |
| 4 | Ryde | 754 | 144 |
| 5 | Central Coast | 753 | 146 |
| 6 | Cessnock | 738 | 191 |
| 7 | Bayside | 732 | 173 |
| 8 | Port Stephens | 700 | 217 |
| 9 | Northern Beaches | 662 | 154 |
| 10 | Hornsby | 655 | 172 |
Source: Ausgrid
Top NSW LGAs by Average Power Outage Duration
No. |
LGA Name |
Avg. Customers Interrupted |
Avg. Duration (min) |
1 |
Lower North Shore |
365 |
364 |
2 |
Waverley |
175 |
246 |
4 |
Mosman |
77 |
234 |
5 |
Sydney |
452 |
232 |
6 |
Upper Hunter |
340 |
224 |
7 |
Canada Bay |
436 |
221 |
8 |
Woollahra |
151 |
219 |
9 |
Singleton |
330 |
217 |
10 |
Port Stephens |
700 |
217 |
11 |
Strathfield |
296 |
212 |
12 |
South Sydney |
336 |
210 |
13 |
Randwick |
474 |
206 |
14 |
Cumberland |
632 |
201 |
15 |
Georges River |
615 |
197 |
16 |
Cessnock |
738 |
191 |
17 |
Ku-ring-gai |
526 |
176 |
3 |
St George |
407 |
173 |
18 |
Bayside |
732 |
173 |
19 |
Hornsby |
655 |
172 |
20 |
Lake Macquarie |
834 |
168 |
21 |
Northern Beaches |
662 |
154 |
22 |
Muswellbrook |
285 |
154 |
23 |
Central Coast |
753 |
146 |
24 |
Ryde |
754 |
144 |
25 |
Inner West |
562 |
143 |
26 |
Maitland |
469 |
141 |
27 |
Canterbury Bankstown |
488 |
141 |
28 |
Newcastle |
482 |
140 |
29 |
Sutherland |
475 |
136 |
30 |
Willoughby |
448 |
134 |
31 |
Hunter's Hill |
1290 |
126 |
32 |
Scone |
379 |
119 |
33 |
Lane Cove |
769 |
116 |
Source: Ausgrid
"Power outages disrupt more than just our daily routines – they can halt essential services, compromise business operations and threaten safety, especially during dangerous heatwaves," says Claire Combridge, Sales and Marketing Manager at PSS Distributors. "For homeowners, blackouts can leave security systems, CCTV and safety lighting inoperable, and prevent access to automatic gates, garage doors and even the internet – now considered a vital service in many countries. For businesses, the risks are even greater, with potential loss of income from downed POS systems, spoiled products like food or vaccines, and damage to critical equipment or data.
"You can minimise the risks by being prepared. Do this investing in backup power like UPS units or generators, and looking at ways to reduce your reliance on the grid through renewable energy solutions. Simple measures, like updating emergency supplies and creating a communication plan for your household or team, can make blackouts more manageable too," she says.
Blackout Hotspots: The Numbers
The report reveals stark disparities in how outages affect different regions:
- High customer impact: Hunter's Hill averages 1,290 customers interrupted per outage, while densely populated areas like Lane Cove and Lake Macquarie also report significant impacts.
- Longest durations: The Lower North Shore tops the list for the longest outages (364 minutes), followed by Waverley (246 minutes) and Mosman (234 minutes).
- Rural challenges: Upper Hunter and Singleton face extended restoration times due to infrastructure accessibility and logistical hurdles.
What Causes Power Outages?
From April 2023 to March 2024, the primary causes of outages were:
- Environmental factors: Severe weather, including storms and lightning.
- Equipment faults: Failures in infrastructure like transformers and powerlines.
- Third-party impacts: Operational errors, accidental cable digs and vandalism.
Regions like Port Stephens and Northern Beaches demonstrate how multiple factors can converge, compounding the impacts on households and businesses.
Read the full report, including detailed LGA rankings and outage causes, here.
About us:
PSS Distributors is a leading Australian provider of power protection solutions, specialising in UPS systems designed to safeguard businesses and homes from the impact of power disturbances. With a commitment to innovation and customer satisfaction, PSS Distributors continues to empower businesses with reliable, scalable and cost-effective power backup solutions.
