What's in Commerce-city, Water Dept., CA tap water

25 contaminants were measured in the Commerce-city, Water Dept., CA water system's 2020 annual report. Each is shown below against its federal limit.

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Reporting year: 2020
Contaminants measured: 25
Over federal limit: 0
Approaching the limit: 0
Service area: CA
Source: Utility CCR

All within federal limits. Every measured contaminant in this report is below its federal threshold.

Compliance history

Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.

No federal drinking-water violations on record for this system.

Other

Contaminant	Measured	Federal limit	Status
Chlorine Total	2.1 mg/LAverageSystem-wide	4 mg/LMCL	Within the limit

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.	33 ug/LAverageAnnual Average	None set	Within the limit
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	6 ug/LAverageAnnual Average	None set	Within the limit
NDMA	Not detected ng/LAverageCentral Basin MWD	10 ng/LNL	Detected — no federal limit

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
FluorideA mineral often added to drinking water to help prevent tooth decay.	0.7 mg/LAverageCentral Basin MWD	4 mg/LMCL	Within the limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg0.7 mg/Lrange0.6–0.9 mg/L23% of limit GroundwaterPlant avg0.64 mg/Lrange0.48–0.71 mg/L18% of limit
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.	1.3 mg/LAverageGroundwater	10 mg/LMCL	Within the limit
+By source (2)— Groundwater, Central Basin MWD GroundwaterPlant avg1.3 mg/Lrange0–2.4 mg/L24% of limit Central Basin MWDZone avgNot detected mg/LrangeNot detected mg/L0% of limit

Metals

Contaminant	Measured	Federal limit	Status
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.	0.00148 mg/L90th percentileAt the tap	0.015 mg/LAction level	Within the limit
CopperA metal that enters water from corroding household plumbing.	0.07 mg/L90th percentileAt the tap	1.3 mg/LAction level	Within the limit
BariumA metal from erosion of natural deposits and industrial discharge.	Not detected mg/LAverageGroundwater	2 mg/LMCL	Within the limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avgNot detected mg/Lrange0–0.1 mg/L5% of limit GroundwaterPlant avgNot detected mg/LrangeNot detected mg/L0% of limit
BoronA naturally occurring element from rock and soil.	0.16 mg/LAverageGroundwater	1 mg/LNL	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg0.15 mg/Lrange0.13–0.18 mg/L GroundwaterPlant avg0.16 mg/Lrange0.16–0.17 mg/L
CalciumA naturally occurring mineral that contributes to water hardness.	77 mg/LAverageCentral Basin MWD	None set	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg77 mg/Lrange27–70 mg/L GroundwaterPlant avg53 mg/Lrange52–56 mg/L
MagnesiumA naturally occurring mineral that contributes to water hardness.	21 mg/LAverageCentral Basin MWD	None set	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg21 mg/Lrange12–26 mg/L GroundwaterPlant avg9.9 mg/Lrange8.4–11 mg/L
PotassiumA naturally occurring mineral from rock and soil.	3.9 mg/LAverageCentral Basin MWD	None set	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg3.9 mg/Lrange2.6–4.7 mg/L GroundwaterPlant avg3 mg/Lrange2.8–3.2 mg/L
SodiumA naturally occurring salt component.	85 mg/LAverageCentral Basin MWD	None set	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg85 mg/Lrange61–101 mg/L GroundwaterPlant avg52 mg/Lrange49–55 mg/L

Physical & aggregate

Contaminant	Measured	Federal limit	Status
TurbidityA measure of cloudiness from suspended particles in the water.	0.06 NTUMaximumSystem-wide	None set	Within the limit
AlkalinityA measure of the water's capacity to neutralize acids.	125 mg/LAverageGroundwater	None set	Detected — no federal limit
+By source (2)— Groundwater, Central Basin MWD GroundwaterPlant avg125 mg/Lrange120–130 mg/L Central Basin MWDZone avg114 mg/Lrange86–128 mg/L
HardnessA measure of dissolved calcium and magnesium minerals.	223 mg/LAverageCentral Basin MWD	None set	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg223 mg/Lrange110–276 mg/L GroundwaterPlant avg173 mg/Lrange164–180 mg/L
pHA measure of how acidic or basic the water is.	8.1AverageCentral Basin MWD	None set	Detected — no federal limit
+By source (2)— Groundwater, Central Basin MWD GroundwaterPlant avg7.8range6.5–8.4 Central Basin MWDZone avg8.1range8.1–8.4
TOCTotal organic carbon — a measure of organic material dissolved in the water.	2.4 mg/LRunning annual avgSystem-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
Total ColiformA group of bacteria used as an indicator of overall water-system sanitation.	0MaximumDistribution System-Wide Highest Monthly	None set	None detected

Radionuclides

Contaminant	Measured	Federal limit	Status
Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements.	Not detected pCi/LAverageGroundwater	0.019 pCi/LPublic health goal	Within the limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avgNot detected pCi/Lrange0–1 pCi/L20% of limit GroundwaterPlant avgNot detected pCi/LrangeNot detected pCi/L0% of limit
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.	Not detected pCi/LAverageGroundwater	15 pCi/LMCL	Within the limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avgNot detected pCi/Lrange0–4 pCi/L27% of limit GroundwaterPlant avgNot detected pCi/LrangeNot detected pCi/L0% of limit
Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances.	Not detected pCi/LAverageCentral Basin MWD	None set	Detected — no federal limit
UraniumA naturally occurring radioactive metal from erosion of natural deposits.	1 pCi/LAverageCentral Basin MWD	20 pCi/LMCL	Detected — no federal limit
+By source (2)— Central Basin MWD, Groundwater Central Basin MWDZone avg1 pCi/Lrange0–3 pCi/L GroundwaterPlant avgNot detected pCi/LrangeNot detected pCi/L

Source: Commerce-city, Water Dept., CA's 2020 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.