Water Information

Every attempt has been made to provide current, accurate, and consistent data in this database. There may be some differences due to sources, methodologies, or timing of data-assembly.

Water Information

Utility Rate Schedule - Monthly Charge for Water Service

Supply Source

Corpus Christi's primary water supply is the Choke Canyon / Lake Corpus Christi Reservoir System within the Nueces River Basin. These reservoirs are fed by the Nueces, Frio and Atascosa Rivers. The upper reaches of these rivers flow through the Edwards Aquifer Recharge Zone. During periods of low flow, most of the river flow north of the aquifer is captured by the aquifer, excluding the northern portion of the basin from the reservoirs' watershed.

Additional water is supplied through Lake Texana. The Mary Rhodes Pipeline delivers water to the O.N. Stevens Water Treatment Plant in Corpus Christi.

Treatment

Raw water is diverted by the City of Corpus Christi is treated at the O. N. Stevens Water Treatment Plant located in the Five Points area of the City. The plant was initially constructed in 1954. It has a rated capacity of producing up to 167 million gallons a day. On average, the plant produces 80 million gallons of water, which is equivalent to 40.

Quality - Raw Water

City of Corpus Christi Water Department
Nueces River Raw Water Quality For Fiscal Year 2006 - 2007

Date of Sample	1- Aug	12- Sep	3- Oct	7- Nov	12- Dec	1- Jan	6- Feb	6- Mar	10- Apr	8- May	6/5/2007	Average	Median	Min.	Max.

Aluminum (mg/L)	1.5	2.1	1.9	3.2	2.1	2.3	2.3	3.1	2.6	2.6	4.2	2.5	2.3	1.5	4.2
Sodium (mg/L)	170	173	173	120	174	224	216	148	152	116	82	158.9	170.0	82.0	224.0
Iron (mg/L)	0.68	0.82	0.78	1.4	0.84	0.92	1	1.3	1.1	0.88	1.7	1.0	0.9	0.7	1.7
Manganese (mg/L)	0.08	< 0.05	0.05	0.08	< 0.05	<0.05	0.05	0.06	0.05	<0.05	0.08	0.1	0.1	0.1	0.1
Copper (mg/L)	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05	<0.05	<0.05	<0.05	< 0.05	<0.05	<0.05			0.0	0.0
Lead (mg/L)	< 0.005	< 0.005	< 0.005	< 0.005	< 0.005	<0.005	<0.005	<0.005	< 0.005	<0.005	<0.05			0.0	0.0
Bromide (mg/L)	0.7	0.7	0.7	0.5	0.5	0.9	1	0.5	0.5	0.2	0.1	0.6	0.5	0.1	1.0
Conductivity (umhos/cm)	1350	1479	1518	1175	1550	1760	1500	1350	1306	1072	838	1354.4	1350.0	838.0	1760.0
T. Alk. (mg CaCO3/L)	145	148	164	153	175	172	178	160	160	152	149	159.6	160.0	145.0	178.0
Calcium (mg/L)	110	76	110	112	140	134	134	111	118	87	73	109.5	111.0	73.0	140.0
Chloride (mg/L)	320	327	340	270	339	395	368	276	270	218	134	296.1	320.0	134.0	395.0
Fluoride (mg/L)	< 0.20	< 0.20	< 0.20	<0.2	0.20	0.28	0.20	0.20	< 0.20	<0.20	<0.20	0.2	0.2	0.2	0.3
T. Hardness (mg CaCO3/L)	318	316	327	286	342	364	360	300	320	264	228	311.4	318.0	228.0	364.0
pH	8.3	8.0	8.0	8.2	7.6	7.6	7.6	7.3	7.8	7.6	8.0	7.8	7.8	7.3	8.3
Silica, Dissolved (mg/L)	28	27	30	25	28	25	24	22	22	21	17	24.5	25.0	17.0	30.0
Sulfate (mg/L)	101	100	101	81	96	118	122	91	85	68	53	92.4	96.0	53.0	122.0
Turbidity (NTU)	15	24	20	40	21	23	24	32	30	28	32	26.3	24.0	15.0	40.0
Dissolved Solids (mg/L)	864	870	924	735	994	926	781	784	616	446	794.0	824.0	446.0	994.0
Suspended Solids (mg/L)	21	29	19	40	4	13	11	13	26	45	22.1	20.0	4.0	45.0

Source: City of Corpus Christi

City of Corpus Christi Water Department
Lake Texana Raw Water Quality For Fiscal Year 2006 - 2007

Date of Sample	1 -Aug	12- Sep	3- Oct	7- Nov	12- Dec	1- Jan	6- Feb	6- Mar	10- Apr	8- May	6/5/2007	Average	Median	Min.	Max.

Aluminum (mg/L)	2.4	1.7	2.3	4.5	7.4	7.8	12	13	13	14	8.8	7.9	7.8	1.7	14.0
Sodium (mg/L)	21	16	16	14	13	13	8.5	7.0	5.6	5.8	26	13.3	13.0	5.6	26.0
Iron (mg/L)	1.1	0.7	0.94	2.1	3.1	3.4	5.1	4.8	4.9	4.5	3.6	3.1	3.4	0.7	5.1
Manganese (mg/L)	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05	<0.05	<0.05	<0.05	< 0.05	<0.05	<0.05			0.0	0.0
Copper (mg/L)	< 0.05	< 0.05	< 0.05	< 0.05	< 0.05	<0.05	<0.05	<0.05	< 0.05	<0.05	<0.05			0.0	0.0
Lead (mg/L)	< 0.005	< 0.005	< 0.005	< 0.005	< 0.005	<0.005	<0.005	<0.005	< 0.005	<0.005	<0.005			0.0	0.0
Bromide (mg/L)	0.1	0.1	< 0.1	< 0.1	0.1	0.1	0.1	0.1	0.1	0.1	<0.1	0.1	0.1	0.1	0.1
Conductivity (umhos/cm)	231	259	271	214	215	207	124	143	123	130	152	188.1	207.0	123.0	271.0
T. Alk. (mg CaCO3/L)	84	85	79	72	70	70	45		< 100	46	51	66.9	70.0	45.0	85.0
Calcium (mg/L)	26	30	30	24	24	25	18	19	< 20	18	22	23.6	24.0	18.0	30.0
Chloride (mg/L)	32	24	30	16	25	24	14	14	< 10	11	10	20.0	20.0	10.0	32.0
Fluoride (mg/L)	< 0.20	< 0.20	< 0.20	<0.2	< 0.20	<0.20	<0.20	<0.20	< 0.20	<0.20	<0.20	#DIV/0!	#NUM!	0.0	0.0
T. Hardness (mg CaCO3/L)	90	90	96	80	90	98	60	84	62	84	74	82.5	84.0	60.0	98.0
pH	8.1	7.8	7.9	8	7.3	7.8	7.3	7.0	7.0	7.1	7.0	7.5	7.3	7.0	8.1
Silica, Dissolved (mg/L)	13	15	16	14	19	14	14	16	13	17	17	15.3	15.0	13.0	19.0
Sulfate (mg/L)	12	12	16	8	8	27	13	1	1	1	6	9.5	8.0	1.0	27.0
Turbidity (NTU)	31	20	27	55	70	70	110	110	110	120	80	73.0	70.0	20.0	120.0
Dissolved Solids (mg/L)	153	137	171	146	161	173	164	202	174	177	165.8	167.5	137.0	202.0
Suspended Solids (mg/L)	9	10	22	23	7	13	11	9	14	10	12.8	10.5	7.0	23.0

Source: City of Corpus Christi

Quality: Treated Water - Holly Road
City of Corpus Christi Water Department
Water Quality Analysis for Holly Road Sampling Location Fiscal Year 2006 - 2007

Date of Sample	1- Aug	12- Sep	3- Oct	7- Nov	12- Dec	1- Jan	6- Feb	6- Mar	10- Apr	8- May	5- Jun	Average	Median	Min.	Max.
Aluminum (mg/L)	0.15	0.16	0.18	0.16	0.16	0.12	0.14	0.15	0.14	0.22	0.23	0.16	0.16	0.12	0.23
Sodium (mg/L)	118	92	90	83	96	110	155	160	100	80	59	103.9	96.0	59.0	160.0
Iron (mg/L)	< 0.05	< 0.05	< 0.05	<0.05	< 0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05			0.0	0.0
Manganese (mg/L)	< 0.05	< 0.05	< 0.05	<0.05	< 0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05			0.0	0.0
Copper (mg/L)	< 0.05	< 0.05	< 0.05	<0.05	< 0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05			0.0	0.0
Lead (mg/L)	< 0.005	< 0.005	< 0.005	<0.005	< 0.005	<0.005	<0.005	<0.005	<0.005	<0.005	<0.005			0.0	0.0
Bromide (mg/L)	0.4	0.3	0.1	0.1	0.1	0.1	0.3	0.3	0.1	<0.1	<0.1	0.2	0.1	0.1	0.4
Conductivity (umhos/cm)	925	870	804	720	927	1050	747	1450	906	746	597	885.6	870.0	597.0	1450.0
T. Alk. (mg CaCO3/L)	100	99	104	102	106	109	105	140	<100	94	92	105.1	103.0	92.0	140.0
Calcium (mg/L)	72	61	62	67	66	70	80	110	101	63	44	72.4	67.0	44.0	110.0
Chloride (mg/L)	200	166	160	142	176	158	254	289	163	132	80	174.5	163.0	80.0	289.0
Fluoride (mg/L)	0.47	0.77	< 0.20	0.78	< 0.20	0.82	0.20	0.75	0.82	0.89	<0.20	0.7	0.8	0.2	0.9
T. Hardness (mg CaCO3/L)	210	205	186	176	204	212	276	308	260	178	160	215.9	205.0	160.0	308.0
pH	7.8	7.6	7.7	7.7	7.2	7.6	7	7.4	7.5	7.4	7.8	7.5	7.6	7.0	7.8
Silica, Dissolved (mg/L)	17	18	19	16	17	16	16	20	13	13	12	16.1	16.0	12.0	20.0
Sulfate (mg/L)	97	82	77	68	72	78	116	124	90	0.22	62	78.7	78.0	0.2	124.0
Turbidity (NTU)	0.20	0.15	0.20	0.30	0.15	0.15	0.30	0.20	0.15	0.25	0.25	0.2	0.2	0.2	0.3
Dissolved Solids (mg/L)	584	505	474	413	505	666	820	544	306	535.2	505.0	306.0	820.0
Suspended Solids (mg/L)	< 2	< 2	< 2	<2	<2	<2	<2	<2	<2	<2			0.0	0.0

Source: City of Corpus Christi

Quality: Treated Water - O.N. Stevens Plant

	Time: 12:00 AM
Production in MG	62.35
Raw Water Blend	Percentage
Nueces River	82.00
Lake Texana	18.00
Conductivity in umho/cm	1221.00
Hardness in mg CaCO3/L	258.00
Hardness in grains/gal	15.10
Chlorine Residual in mg/l	3.90
Disclaimer: Data are subject to change due to weather conditions

Source: City of Corpus Christi