Drinking water quality · 2023
· Verified
What's in Suburban Water Systems-la Mirada — Covina, Ca, CA tap water
45 contaminants were measured in the Suburban Water Systems-la Mirada — Covina, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 45
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- PFOS
- Service area
- CA
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 8.1 ng/LAverageLocal Groundwater | 6.5 ng/LNL | At or above the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 5.4 ng/LAverageLocal Groundwater | 5.1 ng/LNL | At or above the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 1.7 ng/LAverageLocal Groundwater | 3 ng/LNL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | 1 ng/LAverageLocal Groundwater | None set | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected ng/LRangeLocal Groundwater | None set | None detected |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 5.4 ng/LAverageLocal Groundwater | 500 ng/LNL | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | 2.5 ng/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.7 ng/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 2.2 ng/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 31 ug/LAverageAnnual Average | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 11 ug/LAverageAnnual Average | None set | Within the limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0.4 ug/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.3 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.9 ug/LAverageLocal Groundwater | None set | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.1 mg/LAverageTreated Surface Water | 2 mg/LMCL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| 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 |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected ug/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| BoronA naturally occurring element from rock and soil. | 140 ug/LAverageTreated Surface Water | 1000 ug/LNL | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 68 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.9 ug/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| IronA naturally occurring metal common in groundwater. | 11.6 ug/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 26 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| ManganeseA naturally occurring metal from soil and rock. | 3.8 ug/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 4.9 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| SodiumA naturally occurring salt component. | 103 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 2 mg/LAverageLocal Groundwater | 10 mg/LMCL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageTreated Surface Water | 4 mg/LMCL | Within the limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| ChlorideA naturally occurring salt compound. | 104 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| SulfateA naturally occurring mineral from rock and soil. | 224 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.1 NTUAverageLocal Groundwater | 1 NTUMCL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| AlkalinityA measure of the water's capacity to neutralize acids. | 184.3 mg/LAverageLocal Groundwater | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| ColorA measure of visible tint in the water. | 2AverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 270 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| OdorA measure of detectable smell in the water. | 1AverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| pHA measure of how acidic or basic the water is. | 8.2AverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 979AverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.4 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 621 mg/LAverageTreated Surface Water | None set | Detected — no federal limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0.4 ug/LAverageLocal Groundwater | 5 ug/LMCL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0.3 ug/LAverageLocal Groundwater | 5 ug/LMCL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0.4 pCi/LAverageLocal Groundwater | 15 pCi/LMCL | Within the limit |
+By source (2)— Treated Surface Water, Local Groundwater
| |||
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.1 pCi/LAverageLocal Groundwater | 5 pCi/LMCL | Within the limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.7 pCi/LAverageLocal Groundwater | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— Local Groundwater, Treated Surface Water
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 2.7 %MaximumSystem-wide | 0 %MCLG | Detected — no federal limit |
People also ask about Suburban Water Systems-la Mirada — Covina, Ca, CA's water
+Is Suburban Water Systems-la Mirada — Covina, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Suburban Water Systems-la Mirada — Covina, Ca, CA water utility lists 2 contaminants at or above the federal limit: PFOS and PFOA. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Suburban Water Systems-la Mirada — Covina, Ca, CA tap water?
45 contaminants were measured in Suburban Water Systems-la Mirada — Covina, Ca, CA's 2023 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and physical & aggregate. 17 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Suburban Water Systems-la Mirada — Covina, Ca, CA tap water?
2 contaminants in Suburban Water Systems-la Mirada — Covina, Ca, CA's 2023 report sit at or above the federal limit: PFOS (2.0× the limit); PFOA (1.4× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Suburban Water Systems-la Mirada — Covina, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOS, at 2.0× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Suburban Water Systems-la Mirada — Covina, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Suburban Water Systems-la Mirada — Covina, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.