What's in Ventura, CA tap water

37 contaminants were measured in the Ventura, CA water system's 2023 annual report. Each is shown below against its federal limit — 4 sit at or above that limit.

See it on the mapFull source report ↗

Reporting year: 2023
Contaminants measured: 37
Over federal limit: 4
Approaching the limit: 0
Worst contaminant: Specific Conductance
Service area: CA
Source: Utility CCR

At or above the federal limit

Where your water comes from · EPA SDWIS

Ventura, CA's drinking water comes from ground water, drawn from 2 sources.

Source

2ground water

SATICOY CC
SATICOY CC WELL 02

Treatment

2treatment plants

SATICOT CC CLUB WELL 02 - CL2 TREATED
WELL 03 CL2 TRT

Distribution

2storage units

Source: EPA SDWIS facilities inventory. Methodology.

Historical readings · EPA Six-Year Review (2012–2019)

2 contaminants historically over EPA limits in Ventura, CA

About this data

Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.

Contaminant	Worst detection	EPA limit	Years (2012–2019)
NITRATE worst: 2012	91.1 mg/L 9.1×	10 mg/L	'12'13'14'15'16'17'18'19
NITRATE NITRITE worst: 2017	13.3 mg/L 1.3×	10 mg/L	'16'17'18'19
SELENIUM worst: 2015	0.048 mg/L 96%	0.05 mg/L	'12'13'14'15'17'18
TTHM worst: 2017	0.061 mg/L within	0.08 mg/L	'12'13'14'15'16'17'18'19
ARSENIC worst: 2014	0.005 mg/L within below national p90	0.01 mg/L	'12'14'18
GROSS BETA worst: 2014	1.49 mrem/yr within	4 mrem/yr	'14
FLUORIDE worst: 2017	0.92 mg/L within	4 mg/L	'12'13'14'15'16'17'18'19
HAA5 worst: 2014	0.012 mg/L within	0.06 mg/L	'12'13'14'15'16'17'18'19
PCE worst: 2014	0.0006 mg/L within	0.005 mg/L	'14
BARIUM worst: 2012	0.0339 mg/L within below national p90	2 mg/L	'12
URANIUM worst: 2014	0.0173 ug/L within near national p90	30 ug/L	'12'13'14'17'18
COPPER worst: 2012	0.03 mg/L below national p90	—	'12
LEAD worst: 2012	0.0031 mg/L	—	'12
DBAA worst: 2012	0.00656 mg/L	—	'12'13'14'15'16'17'18'19
DCAA worst: 2014	0.00133 mg/L	—	'14
MBAA worst: 2014	0.00137 mg/L	—	'14'17'19
MCAA worst: 2013	0.0011 mg/L	—	'13
TCAA worst: 2014	0.00216 mg/L	—	'14
BROMODICHLOROMETHANE worst: 2012	0.0039 mg/L	—	'12'13'14'15'16'17'18'19
BROMOFORM worst: 2012	0.0322 mg/L	—	'12'13'14'15'16'17'19
CHLOROFORM worst: 2012	0.0007 mg/L	—	'12'15'18
DIBROMOCHLOROMETHANE worst: 2012	0.0158 mg/L	—	'12'13'14'15'16'17'18'19

PWSID CA5602140 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.

Physical & aggregate

Contaminant	Measured	Federal limit	Status
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	1791AverageGround Water	1MCL	At or above the limit
+By source (4)— Ground Water, Distribution System, Ventura River +1 more Ground WaterPlant avg1791range1546–2050205000% of limit Distribution SystemZone avg1354range674–1869186900% of limit Ventura RiverPlant avg1078 NTUrange1070–1099 NTU109900% of limit Casitas MWDZone avg628range62862800% of limit
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	1376 mg/LAverageGround Water	1 mg/LMCL	At or above the limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg1376 mg/Lrange1210–1614 mg/L161400% of limit Ventura RiverPlant avg778 mg/Lrange750–820 mg/L82000% of limit Casitas MWDZone avg420 mg/Lrange420 mg/L42000% of limit
pHA measure of how acidic or basic the water is.	7.5AverageDistribution System	6.5MCL	At or above the limit
TurbidityA measure of cloudiness from suspended particles in the water.	Not detected NTUAverageDistribution System	5 NTUMCL	Within the limit
+By source (3)— Distribution System, Ventura River, Casitas Municipal Water District (CMWD) Distribution SystemZone avgNot detected NTUrange0–3.4 NTU68% of limit Ventura RiverPlant Casitas Municipal Water District (CMWD)Zone
AlkalinityA measure of the water's capacity to neutralize acids.	227 mg/LAverageDistribution System	None set	Detected — no federal limit
HardnessA measure of dissolved calcium and magnesium minerals.	37AverageGround Water	None set	Detected — no federal limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg37range29–53 Ventura RiverPlant avg26 NTUrange25–26 NTU Casitas MWDZone avg15range15
TOCTotal organic carbon — a measure of organic material dissolved in the water.	2.1 mg/LAverageVentura River	None set	Detected — no federal limit

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
SulfateA naturally occurring mineral from rock and soil.	631 mg/LAverageGround Water	500 mg/LMCL	At or above the limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg631 mg/Lrange565–763 mg/L153% of limit Ventura RiverPlant avg267 mg/Lrange205–289 mg/L58% of limit Casitas MWDZone avg166 mg/Lrange166 mg/L33% of limit
ChlorideA naturally occurring salt compound.	73 mg/LAverageGround Water	500 mg/LMCL	Within the limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg73 mg/Lrange48–100 mg/L20% of limit Ventura RiverPlant avg38 mg/Lrange36–43 mg/L9% of limit Casitas MWDZone avg22 mg/Lrange22 mg/L4% of limit
BromideA naturally occurring salt found in source water.	47 ug/LAverageVentura River	None set	Detected — no federal limit

Disinfectants

Contaminant	Measured	Federal limit	Status
ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia.	2.3 mg/LAverageDistribution System	4 mg/LMRDL	Within the limit

Radionuclides

Contaminant	Measured	Federal limit	Status
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.	6.7 pCi/LAverageGround Water	15 pCi/LMCL	Within the limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg6.7 pCi/Lrange5.2–9.2 pCi/L61% of limit Ventura RiverPlant avgNot detected pCi/Lrange0–3.1 pCi/L21% of limit Casitas MWDZone avgNot detected pCi/LrangeNot detected pCi/L0% of limit

Metals

Contaminant	Measured	Federal limit	Status
BoronA naturally occurring element from rock and soil.	0.2 mg/LAverageCasitas MWD	1 mg/LMCL	Within the limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg0.07 mg/Lrange0–0.5 mg/L50% of limit Ventura RiverPlant avg0.13 mg/Lrange0–0.4 mg/L40% of limit Casitas MWDZone avg0.2 mg/Lrange0.2 mg/L20% of limit
ManganeseA naturally occurring metal from soil and rock.	0.0083 mg/LAverageTreated Groundwater	0.05 mg/LMCL	Within the limit
+By source (5)— Ground Water, Treated Groundwater, Treated Surface Water +2 more Ground WaterPlant avgNot detected mg/Lrange0–0.039 mg/L78% of limit Treated GroundwaterPlant avg0.0083 mg/Lrange0.007–0.014 mg/L28% of limit Treated Surface WaterPlant avg0.00055 mg/Lrange0–0.0014 mg/L3% of limit Casitas MWDZone avgNot detected mg/LrangeNot detected mg/L0% of limit Ventura RiverPlant avgNot detected mg/LrangeNot detected mg/L0% of limit
ZincA naturally occurring metal that can also enter water from corroding pipes.	0.023 mg/LAverageVentura River	5 mg/LMCL	Within the limit
+By source (3)— Ventura River, Casitas MWD, Ground Water Ventura RiverPlant avg0.023 mg/Lrange0–0.07 mg/L1% of limit Casitas MWDZone avgNot detected mg/LrangeNot detected mg/L0% of limit Ground WaterPlant avgNot detected mg/LrangeNot detected mg/L0% of limit
IronA naturally occurring metal common in groundwater.	Not detected mg/LAverageCasitas MWD	0.3 mg/LMCL	Within the limit
+By source (3)— Ground Water, Casitas MWD, Ventura River Ground WaterPlant avgNot detected mg/Lrange0–0.054 mg/L18% of limit Casitas MWDZone avgNot detected mg/LrangeNot detected mg/L0% of limit Ventura RiverPlant avgNot detected mg/LrangeNot detected mg/L0% of limit
CalciumA naturally occurring mineral that contributes to water hardness.	142 mg/LAverageDistribution System	None set	Detected — no federal limit
LithiumA naturally occurring element found in some groundwater.	74 ug/LAverageTreated Groundwater	None set	Detected — no federal limit
+By source (3)— Treated Groundwater, Treated Ventura River, Casitas MWD Treated GroundwaterPlant avg74 ug/Lrange48–140 ug/L Treated Ventura RiverPlant avg33 ug/Lrange29–36 ug/L Casitas MWDZone avg15 ug/Lrange14–15 ug/L
MagnesiumA naturally occurring mineral that contributes to water hardness.	51 mg/LAverageGround Water	None set	Detected — no federal limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg51 mg/Lrange34–80 mg/L Ventura RiverPlant avg32 mg/Lrange30–32 mg/L Casitas MWDZone avg25 mg/Lrange25 mg/L
PotassiumA naturally occurring mineral from rock and soil.	5.1 mg/LAverageGround Water	None set	Detected — no federal limit
+By source (3)— Ground Water, Casitas MWD, Ventura River Ground WaterPlant avg5.1 mg/Lrange4–8 mg/L Casitas MWDZone avg3 mg/Lrange3 mg/L Ventura RiverPlant avg2.2 mg/Lrange2–3 mg/L
SodiumA naturally occurring salt component.	128 mg/LAverageGround Water	None set	Detected — no federal limit
+By source (3)— Ground Water, Ventura River, Casitas MWD Ground WaterPlant avg128 mg/Lrange87–213 mg/L Ventura RiverPlant avg49 mg/Lrange46–55 mg/L Casitas MWDZone avg28 mg/Lrange28 mg/L

PFAS ("forever chemicals")

Contaminant	Measured	Federal limit	Status
Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.'	Not detected ug/LAverageCasitas MWD	0.005 ug/LNL	Within the limit
+By source (3)— Treated Ventura River, Casitas MWD, Treated Groundwater Treated Ventura RiverPlant avgNot detected ug/Lrange0–0.0031 ug/L62% of limit Casitas MWDZone avgNot detected ug/LrangeNot detected ug/L0% of limit Treated GroundwaterPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.'	Not detected ug/LAverageCasitas MWD	0.003 ug/LNL	Within the limit
+By source (3)— Treated Ventura River, Casitas MWD, Treated Groundwater Treated Ventura RiverPlant avgNot detected ug/Lrange0–0.003 ug/L100% of limit Casitas MWDZone avgNot detected ug/LrangeNot detected ug/L0% of limit Treated GroundwaterPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
PFAS	Not detected ug/LAverageTreated Ventura River	None set	None detected
+By source (3)— Treated Ventura River, Treated Groundwater, Casitas MWD Treated Ventura RiverPlant avgNot detected ug/LrangeNot detected ug/L Treated GroundwaterPlant avgNot detected ug/LrangeNot detected ug/L Casitas MWDZone avgNot detected ug/LrangeNot detected ug/L
PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products.	Not detected ng/LRangeGround Water	4 ng/LMCL	None detected
PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings.	Not detected ng/LRangeGround Water	4 ng/LMCL	None detected

Microbial

Contaminant	Measured	Federal limit	Status
Total ColiformA group of bacteria used as an indicator of overall water-system sanitation.	1.32 %MaximumDistribution System Monthly	None set	Detected — no federal limit

Source: Ventura, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.