What's in Rainbow Municipal Wd — Fallbrook, Ca, CA tap water

26 contaminants were measured in the Rainbow Municipal Wd — Fallbrook, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.

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Reporting year: 2023
Contaminants measured: 26
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.

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.	57 ug/LAverageSystem-wide	None set	Within the limit
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	15 ug/LAverageSystem-wide	None set	Within the limit

Other

Contaminant	Measured	Federal limit	Status
Chlorine Total	1.91 mg/LAverageSystem-wide	None set	Within the limit

Metals

Contaminant	Measured	Federal limit	Status
ArsenicA naturally occurring element that also enters water from industry and agriculture.	2.1 ug/LAverageTwin Oaks WTP	None set	Within the limit
+By source (3)— Twin Oaks WTP, Skinner WTP, Carlsbad Desal Plant Twin Oaks WTPPlant avg2.1 ug/L21% of limit Skinner WTPPlant avgNot detected ug/LrangeNot detected ug/L0% of limit Carlsbad Desal PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
CopperA metal that enters water from corroding household plumbing.	0.24 mg/L90th percentileAt the tap	1.3 mg/LAction level	Within the limit
BariumA metal from erosion of natural deposits and industrial discharge.	113 ug/LAverageTwin Oaks WTP	2000 ug/LMCL	Within the limit
+By source (3)— Twin Oaks WTP, Skinner WTP, Carlsbad Desal Plant Twin Oaks WTPPlant avg113 ug/Lrange95–122 ug/L6% of limit Skinner WTPPlant avgNot detected ug/LrangeNot detected ug/L0% of limit Carlsbad Desal PlantPlant avgNot detected ug/LrangeNot detected ug/L0% of limit
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.	0.0022 ug/L90th percentileAt the tap	None set	Within the limit
IronA naturally occurring metal common in groundwater.	Not detected mg/LAverageCarlsbad Desal Plant	None set	None detected
+By source (3)— Carlsbad Desal Plant, Skinner WTP, Twin Oaks WTP Carlsbad Desal PlantPlant avgNot detected mg/LrangeNot detected mg/L Skinner WTPPlant avgNot detected mg/LrangeNot detected mg/L Twin Oaks WTPPlant avgNot detected mg/LrangeNot detected mg/L
AluminumA common element sometimes used as a treatment coagulant.	74 ug/LAverageSkinner WTP	None set	Detected — no federal limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avg74 ug/Lrange0–160 ug/L Twin Oaks WTPPlant avg0.05 ug/Lrange0–0.16 ug/L Carlsbad Desal PlantPlant avgNot detected ug/LrangeNot detected ug/L
BoronA naturally occurring element from rock and soil.	140 ug/LAverageTwin Oaks WTP	1 ug/LNL	Detected — no federal limit
+By source (3)— Twin Oaks WTP, Skinner WTP, Carlsbad Desal Plant Twin Oaks WTPPlant avg140 ug/L Skinner WTPPlant avg130 ug/Lrange130 ug/L Carlsbad Desal PlantPlant avg0.65 ug/Lrange0.44–0.92 ug/L
LithiumA naturally occurring element found in some groundwater.	31–44 ug/LRangeSystem-wide	None set	Detected — no federal limit
SodiumA naturally occurring salt component.	99 mg/LAverageTwin Oaks WTP	None set	Detected — no federal limit
+By source (3)— Twin Oaks WTP, Skinner WTP, Carlsbad Desal Plant Twin Oaks WTPPlant avg99 mg/L Skinner WTPPlant avg93 mg/Lrange91–95 mg/L Carlsbad Desal PlantPlant avg57 mg/Lrange54.6–61.5 mg/L

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
FluorideA mineral often added to drinking water to help prevent tooth decay.	0.7 mg/LAverageSkinner WTP	4 mg/LMCL	Within the limit
+By source (3)— Skinner WTP, Carlsbad Desal Plant, Twin Oaks WTP Skinner WTPPlant avg0.7 mg/Lrange0.6–0.8 mg/L20% of limit Carlsbad Desal PlantPlant avg0.696 mg/Lrange0.6–0.799 mg/L20% of limit Twin Oaks WTPPlant avg0.64 mg/Lrange0.6–0.7 mg/L18% of limit
ChlorideA naturally occurring salt compound.	100 mg/LAverageTwin Oaks WTP	None set	Detected — no federal limit
+By source (3)— Carlsbad Desal Plant, Twin Oaks WTP, Skinner WTP Carlsbad Desal PlantPlant avg80 mg/Lrange48–110 mg/L Twin Oaks WTPPlant avg100 mg/Lrange100 mg/L Skinner WTPPlant avg96 mg/Lrange92–100 mg/L
SulfateA naturally occurring mineral from rock and soil.	199 mg/LAverageSkinner WTP	None set	Detected — no federal limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avg199 mg/Lrange195–203 mg/L Twin Oaks WTPPlant avg191 mg/Lrange0–191 mg/L Carlsbad Desal PlantPlant avg14.8 mg/Lrange12–17 mg/L

Radionuclides

Contaminant	Measured	Federal limit	Status
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.	Not detected pCi/LAverageSkinner WTP	15 pCi/LMCL	Within the limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avgNot detected pCi/Lrange0–4 pCi/L27% of limit Twin Oaks WTPPlant avgNot detected pCi/Lrange0–4 pCi/L27% of limit Carlsbad Desal PlantPlant avgNot detected pCi/LrangeNot detected pCi/L0% of limit
Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances.	5 pCi/LAverageTwin Oaks WTP	None set	Detected — no federal limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avgNot detected pCi/Lrange0–8 pCi/L Twin Oaks WTPPlant avg5 pCi/Lrange4.9–5.1 pCi/L Carlsbad Desal PlantPlant avgNot detected pCi/LrangeNot detected pCi/L
UraniumA naturally occurring radioactive metal from erosion of natural deposits.	2 pCi/LAverageSkinner WTP	20 pCi/LMCL	Detected — no federal limit
+By source (3)— Skinner WTP, Carlsbad Desal Plant, Twin Oaks WTP Skinner WTPPlant avg2 pCi/Lrange0–3 pCi/L Carlsbad Desal PlantPlant avgNot detected pCi/LrangeNot detected pCi/L Twin Oaks WTPPlant avgNot detected pCi/LrangeNot detected pCi/L

Microbial

Contaminant	Measured	Federal limit	Status
Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals.	1MaximumNo. of Detections	0MCLG	Detected — no federal limit
Total ColiformA group of bacteria used as an indicator of overall water-system sanitation.	2MaximumNo. of Detections	0MCLG	Detected — no federal limit

Physical & aggregate

Contaminant	Measured	Federal limit	Status
ColorA measure of visible tint in the water.	2AverageSkinner WTP	None set	Detected — no federal limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avg2range1–2 Twin Oaks WTPPlant avgNot detectedrange0–1 Carlsbad Desal PlantPlant avgNot detectedrangeNot detected
HardnessA measure of dissolved calcium and magnesium minerals.	242 mg/LAverageSkinner WTP	None set	Detected — no federal limit
+By source (2)— Skinner WTP, Carlsbad Desal Plant Skinner WTPPlant avg242 mg/Lrange242–243 mg/L Carlsbad Desal PlantPlant avg68.1 mg/Lrange60.4–75.2 mg/L
OdorA measure of detectable smell in the water.	1AverageSkinner WTP	None set	Detected — no federal limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avg1range1 Twin Oaks WTPPlant avgNot detectedrangeNot detected Carlsbad Desal PlantPlant avgNot detectedrangeNot detected
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	910AverageSkinner WTP	None set	Detected — no federal limit
+By source (3)— Skinner WTP, Twin Oaks WTP, Carlsbad Desal Plant Skinner WTPPlant avg910range903–917 Twin Oaks WTPPlant avg827range152–217 Carlsbad Desal PlantPlant avg430.8range242.3–551.4
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	566 mg/LAverageSkinner WTP	None set	Detected — no federal limit
+By source (3)— Twin Oaks WTP, Skinner WTP, Carlsbad Desal Plant Twin Oaks WTPPlant avg545 mg/Lrange474–614 mg/L Skinner WTPPlant avg566 mg/Lrange560–572 mg/L Carlsbad Desal PlantPlant avg240 mg/Lrange149–311 mg/L
TurbidityA measure of cloudiness from suspended particles in the water.	0.07 %MaximumTreatment plant	95 %MCL	Detected — no federal limit

Source: Rainbow Municipal Wd — Fallbrook, 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.