Drinking water quality · 2023
What's in Otay Water District — Spring Valley, Ca, CA tap water
24 contaminants were measured in the Otay Water District — Spring Valley, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 24
- Over federal limit
- 0
- Approaching the limit
- 2
- Service area
- CA
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.
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.2–3.6 mg/LAverageSystem-wide | None set | Approaching the limit |
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
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 10.5–60.6 ug/LAverageSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 3.2–24.4 ug/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. | 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/LReported levelSystem-wide | 1.3 mg/LAction level | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | 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, Twin Oaks 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. | 0.5–0.8 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
+By source (4)— Helix Plant, Carlsbad Desal Plant, Skinner Plant +1 more
| |||
| ChlorideA naturally occurring salt compound. | 48–110 mg/LReported levelCarlsbad Desal Plant | None set | Detected — no federal limit |
+By source (3)— Carlsbad Desal Plant, Skinner Plant, Helix Plant
| |||
| SulfateA naturally occurring mineral from rock and soil. | 152–217 mg/LReported levelTwin Oaks Plant | None set | Detected — no federal limit |
+By source (4)— Twin Oaks Plant, Skinner Plant, Helix Plant +1 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0 %AverageSystem-wide | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %AverageSystem-wide | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ColorA measure of visible tint in the water. | 0–25Reported levelSystem-wide | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 0–1Reported levelSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 903–917Reported levelSkinner Plant | None set | Detected — no federal limit |
+By source (3)— Skinner Plant, Helix Plant, Carlsbad Desal Plant
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 474–614 mg/LReported levelTwin Oaks Plant | None set | Detected — no federal limit |
+By source (4)— Twin Oaks Plant, Skinner Plant, Helix Plant +1 more
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.3 %AverageSystem-wide | 95 %MCL | Detected — no federal limit |
People also ask about Otay Water District — Spring Valley, Ca, CA's water
+Is Otay Water District — Spring Valley, Ca, CA tap water safe to drink in 2023?
Every one of the 24 contaminants measured in Otay Water District — Spring Valley, Ca, CA's 2023 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 Otay Water District — Spring Valley, Ca, CA tap water?
24 contaminants were measured in Otay Water District — Spring Valley, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 6 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 Otay Water District — Spring Valley, Ca, CA tap water approaching the federal limit?
2 contaminants are between 80% and 100% of the federal limit in this report: Chlorine Total and 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 Otay Water District — Spring Valley, 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 Otay Water District — Spring Valley, 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.