Drinking water quality · 2024
· Verified
What's in Chula Vista Otay, CA tap water
13 contaminants were measured in the Chula Vista Otay, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 13
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
Where your water comes from · EPA SDWIS
Chula Vista Otay, CA's drinking water comes from ground water, drawn from 1 source.
Source
- WELL
Treatment
- WELL #1 PFAS TREATMENT PLANT
Distribution
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.
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0–8.5 ug/LReported levelTwin Oaks Plant | None set | Approaching the limit |
+By source (3)— Twin Oaks Plant, Skinner Plant, Helix Plant
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 6.7–39.9 ug/LReported levelSystem-wide | None set | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–5 ug/LReported levelHelix Plant | None set | Within the limit |
+By source (3)— Helix Plant, Carlsbad Desal Plant, Skinner Plant
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 95–122 ug/LReported levelTwin Oaks Plant | None set | Within the limit |
+By source (4)— Twin Oaks Plant, Helix Plant, Carlsbad Desal Plant +1 more
| |||
| CopperA metal that enters water from corroding household plumbing. | 0 mg/L90th percentileSystem-wide | 1.3 mg/LAction level | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 ug/L90th percentileSystem-wide | None set | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 64–230 ug/LReported levelHelix Plant | None set | Detected — no federal limit |
+By source (4)— Helix Plant, Twin Oaks Plant, Skinner Plant +1 more
| |||
| LithiumA naturally occurring element found in some groundwater. | 0–28.9 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 0–9.2 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–4 pCi/LReported levelHelix Plant | 15 pCi/LMCL | Within the limit |
+By source (4)— Helix Plant, Skinner Plant, Carlsbad Desal Plant +1 more
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 0–5 pCi/LReported levelSkinner Plant | None set | Detected — no federal limit |
+By source (4)— Skinner Plant, Twin Oaks Plant, Helix Plant +1 more
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 2–3 pCi/LReported levelTwin Oaks Plant | 20 pCi/LMCL | Detected — no federal limit |
+By source (4)— Twin Oaks Plant, Helix Plant, Skinner Plant +1 more
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.3–0.9 mg/LReported levelHelix Plant | 4 mg/LMCL | Within the limit |
+By source (4)— Helix Plant, Carlsbad Desal Plant, Skinner Plant +1 more
| |||
People also ask about Chula Vista Otay, CA's water
+Is Chula Vista Otay, CA tap water safe to drink in 2024?
Every one of the 13 contaminants measured in Chula Vista Otay, CA's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Chula Vista Otay, CA tap water?
13 contaminants were measured in Chula Vista Otay, CA's 2024 Consumer Confidence Report, spanning metals, radionuclides, and disinfection byproducts. 4 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Chula Vista Otay, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Bromate. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Chula Vista Otay, CA's 2024 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 Chula Vista Otay, 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 2024 report; a new report will replace it once the utility publishes its next annual update.