What's in Cws - Kernville — San Jose, Ca, CA tap water

33 contaminants were measured in the Cws - Kernville — San Jose, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.

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Reporting year: 2023
Contaminants measured: 33
Over federal limit: 1
Approaching the limit: 0
Worst contaminant: Turbidity
Service area: CA
Source: Utility CCR

At or above the federal limit

Turbidity
Physical & aggregate · Reported level
0.19–5.7 NTU
limit 1 NTU · 5.7× the limit

Physical & aggregate

Contaminant	Measured	Federal limit	Status
TurbidityA measure of cloudiness from suspended particles in the water.	0.19–5.7 NTUReported levelSource water	1 NTUMCL	At or above the limit
AlkalinityA measure of the water's capacity to neutralize acids.	163 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg163 mg/Lrange110–230 mg/L Surface WaterPlant avg54 mg/Lrange27–71 mg/L
HardnessA measure of dissolved calcium and magnesium minerals.	191 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg191 mg/Lrange164–210 mg/L Surface WaterPlant avg36 mg/Lrange23–44 mg/L
OdorA measure of detectable smell in the water.	0–1.2Reported levelSource water	None set	Detected — no federal limit
pHA measure of how acidic or basic the water is.	7.4AverageSurface Water	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg7.4range6.6–8.2 Surface WaterPlant avg7.4range6.9–7.8
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	480–580MaximumSystem-wide	None set	Detected — no federal limit
TOCTotal organic carbon — a measure of organic material dissolved in the water.	1.2 mg/LMaximumSystem-wide	None set	Detected — no federal limit
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	310–420 mg/LMaximumSystem-wide	None set	Detected — no federal limit

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	28 ug/LAverageDistribution System-Wide Highest Annual	None set	Within the limit
+By source (2)— Distribution System-Wide, Distribution System-Wide Highest Annual Distribution System-WideZone range8.1–52 ug/L87% of limit Distribution System-Wide Highest AnnualZone avg28 ug/L47% of limit
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.	29 ug/LAverageDistribution System-Wide Highest Annual	None set	Within the limit
+By source (2)— Distribution System-Wide, Distribution System-Wide Highest Annual Distribution System-WideZone range11–41 ug/L51% of limit Distribution System-Wide Highest AnnualZone avg29 ug/L36% of limit

Metals

Contaminant	Measured	Federal limit	Status
ArsenicA naturally occurring element that also enters water from industry and agriculture.	3.5 ug/LAverageSurface Water	None set	Within the limit
+By source (2)— Surface Water, Groundwater Surface WaterPlant avg3.5 ug/Lrange3.5 ug/L35% of limit GroundwaterPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
CopperA metal that enters water from corroding household plumbing.	Not detected mg/L90th percentileDistribution System-Wide	1.3 mg/LAction level	Within the limit
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.	Not detected ug/L90th percentileDistribution System-Wide	None set	None detected
AluminumA common element sometimes used as a treatment coagulant.	70 ug/LAverageSurface Water	None set	Detected — no federal limit
+By source (2)— Surface Water, Groundwater Surface WaterPlant avg70 ug/Lrange0–140 ug/L GroundwaterPlant avgNot detected ug/LrangeNot detected ug/L
BoronA naturally occurring element from rock and soil.	Not detected mg/LAverageSurface Water	1 mg/LNL	Detected — no federal limit
+By source (2)— Surface Water, Groundwater Surface WaterPlant avgNot detected mg/Lrange0–0.13 mg/L GroundwaterPlant avgNot detected mg/LrangeNot detected mg/L
CalciumA naturally occurring mineral that contributes to water hardness.	56 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg56 mg/Lrange46–63 mg/L Surface WaterPlant avg11 mg/Lrange7.2–15 mg/L
LithiumA naturally occurring element found in some groundwater.	13 ug/LAverageSurface Water	None set	Detected — no federal limit
MagnesiumA naturally occurring mineral that contributes to water hardness.	12 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg12 mg/Lrange7.2–16 mg/L Surface WaterPlant avg1.8 mg/Lrange1.1–2.3 mg/L
ManganeseA naturally occurring metal from soil and rock.	0–55 ug/LMaximumSystem-wide	None set	Detected — no federal limit
PotassiumA naturally occurring mineral from rock and soil.	3.2 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg3.2 mg/Lrange2.1–4 mg/L Surface WaterPlant avg0.9 mg/Lrange0–1.7 mg/L
SodiumA naturally occurring salt component.	34 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg34 mg/Lrange29–42 mg/L Surface WaterPlant avg12 mg/Lrange7.2–16 mg/L
ZincA naturally occurring metal that can also enter water from corroding pipes.	0–0.09 mg/LMaximumSystem-wide	None set	Detected — no federal limit

Other

Contaminant	Measured	Federal limit	Status
Chlorine Free	1.1 mg/LAverageDistribution System-Wide	4 mg/LMCL	Within the limit

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
FluorideA mineral often added to drinking water to help prevent tooth decay.	0.76 mg/LAverageGroundwater	4 mg/LMCL	Within the limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg0.76 mg/Lrange0.52–0.95 mg/L24% of limit Surface WaterPlant avg0.19 mg/Lrange0.18–0.19 mg/L5% of limit
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.	Not detected mg/LAverageSurface Water	10 mg/LMCL	Within the limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avgNot detected mg/Lrange0–0.71 mg/L7% of limit Surface WaterPlant avgNot detected mg/LrangeNot detected mg/L0% of limit
ChlorideA naturally occurring salt compound.	9.3–16 mg/LMaximumSystem-wide	None set	Detected — no federal limit
SulfateA naturally occurring mineral from rock and soil.	47–150 mg/LMaximumSystem-wide	None set	Detected — no federal limit

Microbial

Contaminant	Measured	Federal limit	Status
Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals.	0MaximumDistribution System-Wide Highest Monthly	None set	None detected

Radionuclides

Contaminant	Measured	Federal limit	Status
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.	Not detected pCi/LAverageSurface Water	15 pCi/LMCL	Within the limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avgNot detected pCi/Lrange0–4.3 pCi/L29% of limit Surface WaterPlant avgNot detected pCi/Lrange0–4.1 pCi/L27% of limit
UraniumA naturally occurring radioactive metal from erosion of natural deposits.	1.2 pCi/LAverageSurface Water	20 pCi/LMCL	Detected — no federal limit
+By source (2)— Surface Water, Groundwater Surface WaterPlant avg1.2 pCi/Lrange0–2.4 pCi/L GroundwaterPlant avgNot detected pCi/Lrange0–1.6 pCi/L

PFAS ("forever chemicals")

Contaminant	Measured	Federal limit	Status
Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.'	0.21 ng/LAverageGroundwater	500 ng/LNL	Detected — no federal limit
+By source (2)— Groundwater, Surface Water GroundwaterPlant avg0.21 ng/Lrange0–2.2 ng/L Surface WaterPlant avgNot detected ng/LrangeNot detected ng/L
Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.'	1.9 ng/LAverageSurface Water	None set	Detected — no federal limit
+By source (2)— Surface Water, Groundwater Surface WaterPlant avg1.9 ng/Lrange0–3.8 ng/L GroundwaterPlant avg0.62 ng/Lrange0–2.7 ng/L
PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.'	1.6 ng/LAverageSurface Water	None set	Detected — no federal limit
+By source (2)— Surface Water, Groundwater Surface WaterPlant avg1.6 ng/Lrange0–3.1 ng/L GroundwaterPlant avgNot detected ng/LrangeNot detected ng/L

Source: Cws - Kernville — San Jose, Ca, 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.