Merriton flood map & planning overlays
A planning-constraint profile of Merriton
(Port Pirie Regional Council, SA) - 73.41 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
73.41 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Merriton's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Merriton
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled 4 Sep to 3 Oct 2026
Night movements: observed, lowest 5,000 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Merriton at a glance
How Merriton is zoned
Selling in Merriton? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose.
Across its 73.41 km², Merriton is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 100% is flagged bushfire-prone. There is 1 heritage-listed site on record, and the dominant land-use zone is Rural. The median lot measures about 229,206 m² across 160 parcels.
Who lives in Merriton
Census 2021 figures published by the ABS for the Merriton suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 1021, and decile 8 within South Australia. The national average is 1000.
Age profile
Share of Merriton's 55 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Port Pirie Surrounds, the wider ABS statistical area containing Merriton. There is no annual population series published at suburb level, so this describes the surrounding area rather than Merriton itself.
3,212 in 2001 to 3,433 in 2025, up 7%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Merriton data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Bushfire-prone mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Zoning | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Heritage and environment | Mapped where published | the South Australian Planning and Design Code and Location SA spatial data |
| Aircraft noise contours (ANEF) | Not held | the South Australian Planning and Design Code and Location SA spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 3 October 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Merriton address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Merriton lot.
See what's in the $9 report →Merriton planning - frequently asked
Is Merriton flood-prone?
Flood mapping covers Merriton and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 12%).
Is Merriton bushfire-prone?
Around 100% of Merriton is mapped as bushfire-prone, compared with a Port Pirie Regional Council average of 86%.
Is Merriton under a flight path?
Aircraft were observed over about 3% of Merriton in the period sampled, but only above 3,000 ft - the lowest measured was 4,500 ft. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Merriton?
The dominant planning zone in Merriton is Rural.
Does Merriton have heritage-listed places?
Merriton has 1 heritage-listed place on record.
What is the typical lot size in Merriton?
Across 160 surveyed parcels in Merriton, the median lot size is about 229,206 m².
What is the population of Merriton?
At the 2021 Census Merriton had 55 usual residents, with a median age of 45 and an average household size of 2.7 people. The wider Port Pirie Surrounds statistical area, which contains Merriton, went from 3,212 people in 2001 to 3,433 in 2025, up 7%.
Is Merriton an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Merriton scores 1021 and sits in decile 7 of 10 nationally and decile 8 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Merriton?
Median household income in Merriton was $1,666 a week at the 2021 Census, against $1,223 for the typical suburb in Port Pirie Regional Council.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Crystal Brook | 7.2 km | 0% | 100% |
| Wandearah East | 9.2 km | 0% | 100% |
| Clements Gap Barunga West Council |
11.7 km | 0% | 100% |
| Nurom | 12.7 km | 0% | 100% |
| Redhill | 13.1 km | 0% | 100% |
| Narridy Northern Areas Council |
16.4 km | 0% | 100% |
| Huddleston Northern Areas Council |
17.2 km | 0% | 100% |
| Warnertown | 20.4 km | 0% | 100% |
| Collinsfield | 20.8 km | 0% | 100% |
| Fisherman Bay Barunga West Council |
20.9 km | 0% | 47% |