Drinking water quality · 2023
· Verified
What's in Colton, City of — Colton, Ca, CA tap water
22 contaminants were measured in the Colton, City of — Colton, 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
- 22
- 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. | 13.3 ng/LAverageTest Results | 6.5 ng/LNL | At or above the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 6.2 ng/LAverageTest Results | 5.1 ng/LNL | At or above the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 6.6 ng/LAverageTest Results | 3 ng/LNL | Within the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 3.9 ng/LAverageTest Results | 500 ng/LNL | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 3.2 ng/LAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 5 ng/LAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 6.6 ng/LAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 5 ng/LAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 4.35 mg/LAverageTest Results | 10 mg/LMCL | Within the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.44 mg/LAverageTest Results | 4 mg/LMCL | Within the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| ChlorideA naturally occurring salt compound. | 14.85 mg/LAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.12 mg/LAverageTest Results | 4 mg/LMCL | Within the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 130 ug/L90th percentileAt the tap | None set | Within the limit |
| IronA naturally occurring metal common in groundwater. | Not detected ug/LMaximumTest Results | None set | None detected |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 ug/L90th percentileAt the tap | None set | None detected |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 1.37 ug/LAverageOther Water Source - City of Rialto | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 3.33 ug/LAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 0.54 mg/LAverageTest Results | 10 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. | 2.85 ug/LAverageTest Results | None set | Within the limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | Not detected ug/LMaximumOther Water Source - City of Rialto | None set | None detected |
+By source (2)— Other Water Source - City of Rialto, Test Results
| |||
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 50.12 ug/LAverageOther Water Source - City of Rialto | None set | Detected — no federal limit |
+By source (2)— Other Water Source - City of Rialto, Test Results
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 530 uS/cmAverageTest Results | None set | Detected — no federal limit |
+By source (2)— Test Results, Other Water Source - City of Rialto
| |||
People also ask about Colton, City of — Colton, Ca, CA's water
+Is Colton, City of — Colton, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Colton, City of — Colton, 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 Colton, City of — Colton, Ca, CA tap water?
22 contaminants were measured in Colton, City of — Colton, Ca, CA's 2023 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and disinfection byproducts. 8 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 Colton, City of — Colton, Ca, CA tap water?
2 contaminants in Colton, City of — Colton, Ca, CA's 2023 report sit at or above the federal limit: PFOS (3.3× the limit); PFOA (1.6× 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 Colton, City of — Colton, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOS, at 3.3× 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 Colton, City of — Colton, 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 Colton, City of — Colton, 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.