Surveys on Water Supply and Sewerage
Water supply and sewerage
Collection and treatment of waste by Autonomous Communities and Cities, source type and period. 
Unidades: Volume: cubic metres/day. Amount: thousand euros

	2020	2018	2016	2014	2013	2012	2011	2010	2009	2008	2007	2006	2005	2004	2003	2002	2001	2000	
Spain	
    Volume of treated waste water	13.361.642	13.684.587	12.949.076	13.540.084	13.693.645	13.592.255	13.497.518	13.326.802	12.800.974	12.371.505	12.519.495	13.371.704	13.804.901	13.600.198	8.490.051	8.016.351	7.699.936	7.752.624	
    Volume of reused water	1.457.620	1.534.100	1.350.536	1.453.995	1.455.509	1.502.614	1.666.429	1.346.008	1.464.261	1.439.832	1.372.115	1.335.146	1.083.551	1.007.994	463.557	496.714	561.599	733.894	
    Invoiced amount by sewerage and waste water treatment	2.481.515	2.502.060	2.485.747	2.536.798	2.383.001	2.346.109	2.005.529	1.991.090	1.885.025	1.851.494	1.940.830	1.426.699	1.329.547	1.164.635	886.061	777.326	735.009	649.634	
    Length of the sewerage system (km)	148.829	147.237	146.414	146.938	148.847	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	1.148.222	1.210.447	1.174.425	1.131.632	1.122.608	1.233.393	1.331.577	..	..	..	..	..	..	..	..	..	..	..	
Andalucía	
    Volume of treated waste water	1.915.525	2.113.908	1.912.804	2.005.740	2.073.031	2.330.840	2.256.741	1.838.496	1.566.714	1.488.514	1.387.265	1.767.317	1.745.600	1.996.737	1.642.305	1.543.520	1.581.312	1.526.363	
    Volume of reused water	99.968	101.541	113.471	157.083	172.260	240.384	313.820	338.035	326.892	264.917	333.936	124.125	130.757	143.990	106.897	100.443	70.547	115.005	
    Invoiced amount by sewerage and waste water treatment	454.552	426.852	390.594	418.635	381.132	374.806	331.882	296.192	284.071	267.801	283.755	244.127	275.825	242.715	169.640	147.016	140.699	138.425	
    Length of the sewerage system (km)	32.269	30.621	30.771	32.042	30.746	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	205.899	233.977	230.688	232.900	220.309	242.048	261.282	..	..	..	..	..	..	..	..	..	..	..	
Aragón	
    Volume of treated waste water	533.675	478.592	526.337	552.592	557.871	512.896	549.061	649.614	677.212	617.991	590.011	552.921	580.191	572.649	292.031	247.118	247.468	257.880	
    Volume of reused water	10.043	37.180	4.063	4.189	4.363	3.410	4.022	4.936	3.712	2.336	2.565	1.053	4.078	959	266	36.069	31.213	31.000	
    Invoiced amount by sewerage and waste water treatment	87.533	85.125	79.873	73.280	72.693	67.075	67.745	75.532	72.348	69.785	91.409	63.835	54.485	46.549	30.007	28.238	23.887	23.638	
    Length of the sewerage system (km)	4.649	4.697	4.852	4.398	4.037	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	36.243	40.520	46.346	50.836	48.812	50.439	48.971	..	..	..	..	..	..	..	..	..	..	..	
Asturias, Principado de	
    Volume of treated waste water	446.555	370.603	403.460	552.204	451.120	409.599	367.351	335.400	298.913	273.866	285.462	327.610	296.015	267.259	142.679	86.113	93.800	115.637	
    Volume of reused water	26.285	24.946	15.723	38.187	0	255	7.222	5.517	0	0	8.487	7.928	9.047	29.480	2.128	0	0	0	
    Invoiced amount by sewerage and waste water treatment	50.828	57.671	49.125	56.517	47.756	47.745	45.538	44.613	45.012	40.169	42.495	34.405	29.010	17.538	23.026	18.366	17.493	15.194	
    Length of the sewerage system (km)	5.067	4.892	5.176	5.137	5.419	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	18.097	22.850	20.184	40.565	17.843	24.173	23.739	..	..	..	..	..	..	..	..	..	..	..	
Balears, Illes	
    Volume of treated waste water	309.685	341.865	313.241	335.193	396.379	394.772	377.398	280.047	301.103	291.718	323.705	367.836	452.976	331.908	178.939	172.067	146.948	183.892	
    Volume of reused water	140.682	116.320	103.425	152.471	191.227	117.870	109.696	95.389	125.859	99.600	108.131	131.771	149.732	101.280	51.043	64.486	64.181	101.197	
    Invoiced amount by sewerage and waste water treatment	98.223	102.507	97.948	95.166	93.396	87.038	68.648	104.159	70.022	77.942	74.987	63.386	49.364	36.101	38.704	41.763	41.521	34.450	
    Length of the sewerage system (km)	3.889	3.622	3.720	3.684	3.672	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	44.619	32.272	44.490	19.743	25.153	35.739	34.446	..	..	..	..	..	..	..	..	..	..	..	
Canarias	
    Volume of treated waste water	318.386	282.590	341.769	382.674	330.186	367.286	341.566	339.630	357.252	340.174	297.974	297.054	258.900	209.647	224.998	207.657	166.612	181.895	
    Volume of reused water	75.336	61.711	67.962	75.968	69.611	85.344	85.282	86.956	96.292	90.876	90.327	166.195	81.013	81.777	117.996	102.440	78.132	98.737	
    Invoiced amount by sewerage and waste water treatment	54.208	55.701	62.441	53.816	59.199	63.488	65.149	55.936	56.709	48.350	56.882	47.493	44.236	47.324	37.347	33.460	28.758	25.916	
    Length of the sewerage system (km)	5.469	6.197	5.424	5.562	8.188	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	22.245	21.815	17.405	25.497	17.006	62.344	30.602	..	..	..	..	..	..	..	..	..	..	..	
Cantabria	
    Volume of treated waste water	293.290	349.650	319.351	266.992	286.585	257.359	245.869	279.236	243.190	254.799	223.436	283.538	287.291	204.618	85.211	65.373	49.138	85.939	
    Volume of reused water	4.911	3.910	5.486	5.337	5.636	10.413	0	0	0	0	0	3.442	3.431	2.715	11.843	753	318	0	
    Invoiced amount by sewerage and waste water treatment	40.967	35.835	37.354	36.131	31.060	26.833	28.593	23.743	21.374	20.232	19.598	14.217	14.526	13.210	13.771	12.508	12.187	12.447	
    Length of the sewerage system (km)	2.347	2.305	2.405	2.473	2.569	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	22.301	24.066	24.582	66.904	22.498	32.991	48.602	..	..	..	..	..	..	..	..	..	..	..	
Castilla y León	
    Volume of treated waste water	1.129.762	1.304.756	1.026.339	1.070.390	1.090.397	1.180.864	1.085.202	1.425.452	1.325.983	1.297.653	1.719.236	1.588.593	1.453.871	983.050	537.222	513.616	295.914	299.200	
    Volume of reused water	11.429	26.461	9.387	10.758	13.841	8.438	2.460	9.693	9.430	8.864	8.790	13.845	4.793	3.693	3.505	18.050	2.953	2.060	
    Invoiced amount by sewerage and waste water treatment	91.994	96.574	97.534	94.668	97.520	109.990	92.986	111.100	109.870	103.715	129.035	96.834	64.651	47.057	34.387	19.284	20.188	15.224	
    Length of the sewerage system (km)	9.925	10.644	9.880	10.807	10.309	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	91.635	112.992	89.167	72.747	81.278	77.449	74.381	..	..	..	..	..	..	..	..	..	..	..	
Castilla-La Mancha	
    Volume of treated waste water	557.720	646.665	498.337	528.160	636.849	606.197	697.040	581.596	543.248	508.587	429.921	488.963	581.152	492.724	339.362	301.625	336.019	279.765	
    Volume of reused water	15.501	12.385	18.822	15.297	22.348	4.046	4.625	13.587	19.901	17.516	18.041	16.349	19.734	9.193	5.524	17.241	21.562	13.210	
    Invoiced amount by sewerage and waste water treatment	63.428	65.501	68.583	67.524	79.176	69.187	77.744	67.355	63.367	55.097	51.044	57.160	44.159	27.349	25.922	20.303	18.938	15.404	
    Length of the sewerage system (km)	8.305	8.255	8.754	8.062	8.893	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	26.118	52.349	19.894	22.461	33.279	49.236	56.593	..	..	..	..	..	..	..	..	..	..	..	
Cataluña	
    Volume of treated waste water	1.935.244	1.775.463	1.716.803	1.724.980	1.788.210	1.776.438	1.892.045	1.894.845	1.850.979	1.821.859	1.805.479	1.993.776	1.609.402	1.960.241	1.440.621	1.435.569	1.609.628	1.820.654	
    Volume of reused water	105.070	79.245	83.397	69.315	83.247	78.074	77.644	91.424	116.657	113.764	72.931	106.259	120.749	31.062	11.124	13.781	13.452	162.572	
    Invoiced amount by sewerage and waste water treatment	506.831	535.777	560.419	610.906	554.671	581.350	369.452	371.912	361.877	362.795	423.628	142.007	112.150	84.293	134.134	117.210	97.457	106.571	
    Length of the sewerage system (km)	14.560	14.430	14.197	14.372	14.022	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	252.523	216.266	214.369	209.593	205.345	159.497	170.341	..	..	..	..	..	..	..	..	..	..	..	
Comunitat Valenciana	
    Volume of treated waste water	1.282.866	1.317.728	1.153.786	1.150.165	1.210.832	1.233.312	1.298.793	1.375.663	1.377.454	1.402.775	1.372.100	1.334.458	1.385.387	1.376.471	724.831	625.980	551.977	637.732	
    Volume of reused water	545.832	562.786	548.751	682.044	663.165	739.726	836.164	427.975	476.029	502.987	426.033	634.499	434.495	502.809	135.196	66.078	98.934	161.472	
    Invoiced amount by sewerage and waste water treatment	331.974	344.083	338.584	328.752	291.896	282.548	240.186	240.154	232.875	240.585	229.849	195.797	170.394	157.394	74.866	67.265	60.010	39.727	
    Length of the sewerage system (km)	15.356	15.205	15.540	14.412	15.965	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	114.510	119.221	136.295	127.572	130.447	130.853	141.570	..	..	..	..	..	..	..	..	..	..	..	
Extremadura	
    Volume of treated waste water	354.386	415.490	404.633	444.289	413.603	449.889	514.727	409.066	347.812	385.720	403.993	282.573	356.163	126.298	266.420	244.332	175.387	150.022	
    Volume of reused water	0	0	0	151	0	0	2.381	0	0	0	0	3.253	6.351	2.103	1.293	17.082	16.227	0	
    Invoiced amount by sewerage and waste water treatment	32.712	31.663	31.443	35.030	31.564	36.006	31.216	33.022	34.550	40.789	40.494	27.920	26.257	18.445	21.681	19.447	19.410	13.288	
    Length of the sewerage system (km)	3.820	3.874	3.198	3.279	3.547	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	32.821	20.515	28.854	23.811	29.541	36.211	121.065	..	..	..	..	..	..	..	..	..	..	..	
Galicia	
    Volume of treated waste water	1.047.977	1.039.852	891.827	904.492	978.384	955.690	827.195	834.061	896.645	737.520	751.661	679.221	743.950	1.140.686	497.878	523.872	447.168	373.745	
    Volume of reused water	89.700	189.218	78.630	1.254	0	2.580	1.466	1.444	1.671	1.658	1.394	1.642	2.559	4.107	1.561	574	162	0	
    Invoiced amount by sewerage and waste water treatment	97.583	104.719	90.172	81.438	78.133	73.275	78.129	75.332	67.028	58.898	63.784	48.848	65.217	63.441	29.509	27.007	29.122	22.814	
    Length of the sewerage system (km)	12.210	12.077	12.898	13.502	13.809	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	38.988	46.358	45.462	25.146	23.695	67.245	48.954	..	..	..	..	..	..	..	..	..	..	..	
Madrid, Comunidad de	
    Volume of treated waste water	1.401.292	1.487.112	1.500.326	1.681.915	1.687.026	1.570.983	1.656.841	1.549.957	1.428.676	1.515.336	1.432.331	1.843.835	2.043.836	2.102.584	1.133.616	1.107.471	1.145.424	1.129.075	
    Volume of reused water	36.320	34.832	34.178	39.865	29.175	31.160	24.874	18.677	17.051	16.945	17.352	15.392	13.526	12.980	4.139	7.204	4.486	7.887	
    Invoiced amount by sewerage and waste water treatment	294.720	291.575	312.980	311.654	306.426	293.606	283.401	266.204	270.007	257.560	215.085	192.405	165.388	158.221	109.766	95.874	94.435	54.241	
    Length of the sewerage system (km)	15.183	15.083	14.841	14.188	12.233	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	100.111	109.253	103.141	115.375	116.992	98.297	122.881	..	..	..	..	..	..	..	..	..	..	..	
Murcia, Región de	
    Volume of treated waste water	313.800	283.869	356.164	363.900	302.171	298.630	315.288	303.283	303.319	288.243	285.956	293.788	338.710	290.694	241.049	222.263	206.781	84.198	
    Volume of reused water	286.754	271.355	255.680	183.227	186.405	171.330	181.082	235.007	257.251	272.876	256.580	108.653	100.873	78.509	2.569	34.664	53.755	7.285	
    Invoiced amount by sewerage and waste water treatment	88.856	87.857	85.453	89.750	86.353	82.181	72.774	68.377	66.677	75.322	83.296	63.953	67.235	60.067	21.556	20.782	18.569	23.974	
    Length of the sewerage system (km)	6.408	6.274	6.280	6.005	5.833	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	33.512	32.132	34.607	30.629	30.285	42.908	30.430	..	..	..	..	..	..	..	..	..	..	..	
Navarra, Comunidad Foral de	
    Volume of treated waste water	286.610	295.282	209.822	215.947	226.908	192.638	189.806	207.969	225.018	313.229	366.868	348.483	336.520	329.649	151.945	140.459	121.919	132.588	
    Volume of reused water	220	0	0	0	0	0	0	0	0	0	0	0	0	0	0	6.917	7.027	29	
    Invoiced amount by sewerage and waste water treatment	36.183	33.995	30.211	32.266	35.506	38.146	37.441	37.561	34.653	35.900	41.159	37.331	31.288	30.494	18.502	14.954	14.129	16.023	
    Length of the sewerage system (km)	3.850	3.789	3.162	3.304	3.314	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	55.176	59.253	46.081	45.867	52.519	54.820	42.628	..	..	..	..	..	..	..	..	..	..	..	
País Vasco	
    Volume of treated waste water	1.013.022	978.794	1.181.241	1.166.863	1.056.816	883.752	718.825	830.902	851.532	616.474	575.885	657.062	1.042.034	902.268	515.848	475.505	433.841	422.389	
    Volume of reused water	9.569	12.187	11.561	18.378	13.810	9.316	15.458	16.907	13.405	47.493	27.548	143	1.509	0	8.423	10.598	98.500	33.340	
    Invoiced amount by sewerage and waste water treatment	132.188	128.700	135.071	132.930	118.100	97.852	101.349	104.810	77.837	77.837	72.323	79.472	96.832	96.011	97.356	85.950	90.709	84.725	
    Length of the sewerage system (km)	4.010	3.943	4.179	4.475	4.924	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	45.758	55.561	65.130	63.260	60.058	60.874	67.862	..	..	..	..	..	..	..	..	..	..	..	
Rioja, La	
    Volume of treated waste water	179.071	160.431	151.978	148.053	163.030	138.318	143.770	143.244	183.732	195.047	247.557	245.362	268.906	284.046	56.096	83.811	70.800	52.650	
    Volume of reused water	0	0	0	0	0	0	0	0	0	0	0	75	272	335	0	134	0	0	
    Invoiced amount by sewerage and waste water treatment	14.870	13.580	13.756	13.262	13.337	10.750	10.721	11.335	13.405	15.536	19.909	15.639	16.701	16.776	5.887	7.899	7.497	7.573	
    Length of the sewerage system (km)	1.207	1.024	835	951	1.082	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	5.535	8.247	6.096	5.415	5.654	7.219	5.830	..	..	..	..	..	..	..	..	..	..	..	
Ceuta and Melilla	
    Volume of treated waste water	42.776	41.937	40.858	45.535	44.247	32.792	20.000	48.341	22.192	22.000	20.655	19.314	23.997	28.669	19.000	20.000	19.800	19.000	
    Volume of reused water	0	23	0	471	421	268	233	461	111	0	0	522	632	3.002	50	200	150	100	
    Invoiced amount by sewerage and waste water treatment	3.865	4.345	4.206	5.073	5.083	4.233	2.575	3.753	3.343	3.181	2.098	1.870	1.829	1.650	0	0	0	0	
    Length of the sewerage system (km)	305	305	302	285	285	..	..	..	..	..	..	..	..	..	..	..	..	..	
    Volume of the sludge generated in waste water treatment (tonnes of dry matter /year)	2.131	2.800	1.634	1.959	1.894	1.050	1.400	..	..	..	..	..	..	..	..	..	..	..	
Notas:
Fuente: National Statistics Institute