A Review of On-Site Wastewater Treatment Systems in Western Australia from 1997 to 2011

Table 3

Type of OWTS approved by LG periods 1997–2011.

Number	Location	System type	Year															Total	Total per LG
			97	98	99	00	01	02	03	04	05	06	07	08	09	10	11
1	Armadale	Septic tank	62	29	102	104	103	56	55	55	32	48	94	60	114	101	97	1112	1377
		ATU	125								24	16	9	21	23	22	24	264
		Composting toilet														1		1
2	Ashburton	Septic tank													1	10	10	21	72
		ATU													3	10	23	36
		Composting toilet															1	1
		Others (holding tanks)													2	4	8	24
3	Belmont	ATU				1						1						2
		Others									1			2	1			4
4	Chittering	Septic tank	5	55	64	48	41	48	58	72	53	71	68	46	45	46	51	771	1164
		ATU	3	8	10	7		3	6	9	7	9	8	13	23	31	20	157
		Composting toilet	2			2	3		2			3	1					13
		Others		3	6	9	7	5	17	13	24	34	23	25	24	21	12	223
5	Cockburn	Septic tank		29	28	33	40	50	55	60	22	25	20	28	16	16	8	430	446
		ATU	1	4	4	1	1	3		2								16
6	Cue	Septic tank												1	5	3	1	10	10
7	Dalwallinu	Septic tank												1	3	2	1	7	11
		ATU												2	1	1		4
8	Dandaragan	Septic tank			27	47	31	36	34	44	64	41	33	38	19	16	13	443	447
		ATU												4				4
9	Dardanup	Septic tank													8	12	13	33	35
		ATU														1	1	2
10	Derby	Systems not specified	24	11	3	14	10	6	6	8	6	12	18	20	13	11	39	201	201
11	Donnybrook-Balingup	Septic tank											42	53	50	51	59	255	264
		ATU											1	0	4	3	1	9
12	East Fremantle	Greywater system								1	1	1	1	1	1	1	1	8	8
13	Esperance	Septic tank				77							25	56	40	39	26	263	741
		ATU				1							2	9	6	3	1	22
		Systems not specified	106	79			50	43	35	46	37	60						456
		Septic tank	7	7	6	4	2	2	2	2	1					1	1	35
14	Fremantle	ATU							1	1			1			1	1	5	95
		Others							1		3	2	13	7	14	8	7	55
15	Gosnells	Septic tank										12	12	17	19	20	19	99	119
		ATU										2	2	4	1	1	3	13
		Composting toilet											1					1
		Others										2	3	1				6
16	Joondalup	Septic tank	14	29	22	17	15	22	12	9	1	2	2	1	1		1	148	148
		Septic tank	77	74	91	73	76	75	66	66	71	70	64	44	45	60	51	1003
17	Kalamunda	ATU	28	24	23	11	14	13	5	15	18	18	27	19	27	28	20	290	1321
		Composting toilet									1		1		1			3
		Others		3	1			1		1	1	3	7	2	2	3	1	25
18	Manjimup	Septic tank	22	68	63	49	33	38	35	26	48	47	42	48	56	42	29	646	665
		ATU		1			2				1		1	4	3	2		14
		Composting toilet						1									1	2
		Others									1			2				3
19	Mundaring	Septic tank	11	93	224	183	113	107	94	29	84	101	115	171	42	125	70	1562	1788
		ATU	2	4	16	15	4	10	12	5	1	4	9	13	5	16	27	143
		Composting toilet						1										1
		NRS		1		2	2	8	6	1	3	6	6	6	1	1	2	45
		Greywater system						2			1	7	3	13	3	4	4	37
20	Murchison	Septic tank												1				1	1
21	Murray	Septic tank										6	14	38	32	40	23	153	199
		ATU										7	10	10	4	6	9	46
22	Nedlands	Septic tank					1		2			2	5	2	3	1	4	20	26
		ATU								1	1		1			1		4
		Others												1	1			2
23	Northampton	Septic tank													3	4	4	11	11
24	Plantagenet	Septic tank				36	39	47	37	52	41	83	53	61	37	31	34	551	565
		ATU									1	4	1	5			1	12
		Composting toilet												1				1
		Others										1						1
25	Port Hedland	Septic tank											8	3	2	1	3	17	29
		ATU												1		1	4	6
		Treatment plant											1	1			3	5
		Others															1	1
26	Serpentine-Jarrahdale	Septic tank							72	149	48	30	25	16	26	15	47	428	1189
		ATU							24	77	135	88	105	90	55	112	75	761
27	Stirling	Septic tank	31	38	48	28	21	21	12	3	7	1	1	1	2		1	215	227
		ATU		1	5	1					1					1	2	11
		Others															1	1
28	Wanneroo	Septic tank	93	124	107	96	103	128	133	120	84	77	70	67	46	52	60	1360	1377
		ATU												2		1	2	5
		Others (Ecomax)								1	1	2		1		3	4	12