What's in City of Tustin — Tustin, Ca, CA tap water

45 contaminants were measured in the City of Tustin — Tustin, Ca, CA water system's 2022 annual report. Each is shown below against its federal limit.

Browse the mapFull source report ↗

Reporting year: 2022
Contaminants measured: 45
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.

Maximum contaminant level exceededHealth-based
3 violations on record · most recent Aug 1998
resolved

Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.	43 ug/LAverageAverage Amount	None set	Within the limit
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	16 ug/LAverageAverage Amount	None set	Within the limit
BromateA disinfection byproduct formed when bromide-containing water is treated with ozone.	Not detected ug/LAverageMWD Surface Water	None set	Within the limit
Bromodichloroacetic acidA brominated haloacetic acid disinfection byproduct.	Not detected ug/LAverageAverage Amount	None set	Detected — no federal limit

Disinfectants

Contaminant	Measured	Federal limit	Status
ChlorineA disinfectant added to drinking water to kill bacteria and viruses.	1.38 mg/LAverageAverage Amount	4 mg/LMCL	Within the limit

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.	2.6 mg/LAverageLocal Groundwater	10 mg/LMCL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg2.6 mg/L26% of limit MWD Surface WaterPlant avg0.7 mg/L7% of limit
FluorideA mineral often added to drinking water to help prevent tooth decay.	0.7 mg/LAverageMWD Surface Water	4 mg/LMCL	Within the limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg0.7 mg/L18% of limit Local GroundwaterPlant avg0.16 mg/L4% of limit
Dichloroacetic acidA haloacetic acid disinfection byproduct.	0.94 ug/LAverageAverage Amount	0 ug/LMCLG	Within the limit
Dibromoacetic acidA brominated haloacetic acid disinfection byproduct.	0.83 ug/LAverageAverage Amount	None set	Within the limit
Bromochloroacetic acidA mixed-halogen haloacetic acid disinfection byproduct.	0.58 ug/LAverageAverage Amount	None set	Within the limit
Trichloroacetic acidA haloacetic acid disinfection byproduct.	0.48 ug/LAverageAverage Amount	None set	Within the limit
Chlorodibromoacetic acidA brominated haloacetic acid disinfection byproduct.	0.26 ug/LAverageAverage Amount	None set	Within the limit
Monobromoacetic acidA brominated haloacetic acid disinfection byproduct.	Not detected ug/LAverageAverage Amount	None set	Within the limit
BromideA naturally occurring salt found in source water.	0.26 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
ChlorideA naturally occurring salt compound.	132 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg132 mg/L MWD Surface WaterPlant avg66 mg/L
SulfateA naturally occurring mineral from rock and soil.	161 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg161 mg/L MWD Surface WaterPlant avg122 mg/L

Other

Contaminant	Measured	Federal limit	Status
Nitrate Nitrite	2.6 mg/LAverageLocal Groundwater	10 mg/LMCL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg2.6 mg/L26% of limit MWD Surface WaterPlant avg0.7 mg/L7% of limit

Physical & aggregate

Contaminant	Measured	Federal limit	Status
TurbidityA measure of cloudiness from suspended particles in the water.	0.16 NTUAverageLocal Groundwater	1 NTUMCL	Within the limit
+By source (3)— Local Groundwater, Metropolitan Water District Diemer Filtration Plant, MWD Surface Water Local GroundwaterPlant avg0.16 NTU16% of limit Metropolitan Water District Diemer Filtration PlantPlant 8% of limit MWD Surface WaterPlant avgNot detected NTU0% of limit
AlkalinityA measure of the water's capacity to neutralize acids.	209 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg209 mg/L MWD Surface WaterPlant avg84 mg/L
ColorA measure of visible tint in the water.	2AverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg2 Local GroundwaterPlant avgNot detected
HardnessA measure of dissolved calcium and magnesium minerals.	415 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg415 mg/L MWD Surface WaterPlant avg160 mg/L
OdorA measure of detectable smell in the water.	2AverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg2 Local GroundwaterPlant avgNot detected
pHA measure of how acidic or basic the water is.	8.5AverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg8.5 Local GroundwaterPlant avg7.7
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	642AverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg642 Local GroundwaterPlant avg608
TOCTotal organic carbon — a measure of organic material dissolved in the water.	2.4 mg/LAverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg2.4 mg/L Local GroundwaterPlant avgNot detected mg/L
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	394 mg/LAverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg394 mg/L Local GroundwaterPlant avg344 mg/L

Metals

Contaminant	Measured	Federal limit	Status
CopperA metal that enters water from corroding household plumbing.	0.17 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/LAverageLocal Groundwater	2 mg/LMCL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected mg/L0% of limit MWD Surface WaterPlant avgNot detected mg/L0% of limit
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.	Not detected ug/L90th percentileAt the tap	None set	None detected
SeleniumA trace element from natural deposits and industrial discharge.	Not detected ug/LAverageLocal Groundwater	None set	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected ug/L0% of limit MWD Surface WaterPlant avgNot detected ug/L0% of limit
AluminumA common element sometimes used as a treatment coagulant.	105 ug/LAverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg0.105 ug/L Local GroundwaterPlant avgNot detected mg/L
BoronA naturally occurring element from rock and soil.	0.13 mg/LAverageMWD Surface Water	1 mg/LNL	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg0.13 mg/L Local GroundwaterPlant avg0.11 mg/L
CalciumA naturally occurring mineral that contributes to water hardness.	113 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg113 mg/L MWD Surface WaterPlant avg38 mg/L
MagnesiumA naturally occurring mineral that contributes to water hardness.	31.7 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg31.7 mg/L MWD Surface WaterPlant avg15 mg/L
ManganeseA naturally occurring metal from soil and rock.	1.2 ug/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg1.2 ug/L MWD Surface WaterPlant avgNot detected ug/L
PotassiumA naturally occurring mineral from rock and soil.	3.4 mg/LAverageMWD Surface Water	None set	Detected — no federal limit
+By source (2)— MWD Surface Water, Local Groundwater MWD Surface WaterPlant avg3.4 mg/L Local GroundwaterPlant avg2.6 mg/L
SodiumA naturally occurring salt component.	94 mg/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg94 mg/L MWD Surface WaterPlant avg69 mg/L

PFAS ("forever chemicals")

Contaminant	Measured	Federal limit	Status
Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.'	Not detected ng/LAverageLocal Groundwater	3 ng/LNL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected ng/L0% of limit MWD Surface WaterPlant avgNot detected ng/L0% of limit
PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products.	Not detected ng/LAverageLocal Groundwater	5.1 ng/LNL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected ng/L0% of limit MWD Surface WaterPlant avgNot detected ng/L0% of limit
PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings.	Not detected ng/LAverageLocal Groundwater	6.5 ng/LNL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected ng/L0% of limit MWD Surface WaterPlant avgNot detected ng/L0% of limit
Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.'	Not detected ng/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected ng/L MWD Surface WaterPlant avgNot detected ng/L
Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.'	2.8 ng/LAverageLocal Groundwater	None set	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg2.8 ng/L MWD Surface WaterPlant avgNot detected ng/L

Radionuclides

Contaminant	Measured	Federal limit	Status
Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances.	Not detected pCi/LAverageLocal Groundwater	15 pCi/LMCL	Within the limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avgNot detected pCi/L0% of limit MWD Surface WaterPlant avgNot detected pCi/L0% of limit
Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances.	Not detected pCi/LAverageMWD Surface Water	None set	Detected — no federal limit
UraniumA naturally occurring radioactive metal from erosion of natural deposits.	1.1 pCi/LAverageLocal Groundwater	20 pCi/LMCL	Detected — no federal limit
+By source (2)— Local Groundwater, MWD Surface Water Local GroundwaterPlant avg1.1 pCi/L MWD Surface WaterPlant avg1 pCi/L

Source: City of Tustin — Tustin, Ca, CA's 2022 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.