# El Segundo-city, Water Dept. — El Segundo, Ca, CA — Drinking Water Quality (2021)

> Contaminant levels for the El Segundo-city, Water Dept. — El Segundo, Ca, CA public water system from its 2021 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/el-segundo-city-water-dept-el-segundo-ca/2021
- JSON API: https://www.thewatermap.com/api/water/ca/el-segundo-city-water-dept-el-segundo-ca/2021
- Source: the utility's annual Consumer Confidence Report (CCR)
- Verification: transcribed by a model, cross-checked by a second model, approved before publishing
- Reporting year: 2021
- Contaminants measured: 16
- Contaminants with a federal limit: 7
- Contaminants at or above the federal limit: 1
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Bromate | Disinfection byproducts | 0–55 ug/L (Reported level) | Skinner Plant | No federal limit | At or above the limit |
| HAA5 | Disinfection byproducts | 0–13 ug/L (Reported level) | Diemer Plant | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 25–34 ug/L (Reported level) | Diemer Plant | No federal limit | Within the limit |
| Fluoride | Inorganic chemicals | 0.6–0.8 mg/L (Reported level) | Mills Plant | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.9 mg/L (Reported level) | Jensen Plant | 10 mg/L (MCL) | Within the limit |
| Aluminum | Metals | 0–230 ug/L (Reported level) | Skinner Plant | No federal limit | Detected — no federal limit |
| Arsenic | Metals | 2.4 ug/L (Reported level) | Jensen Plant | No federal limit | Within the limit |
| Barium | Metals | 111 ug/L (Reported level) | Diemer Plant | 2000 ug/L (MCL) | Within the limit |
| Total Coliform | Microbial | 0–0.04 % (Reported level) | Jensen Plant | No federal limit | Detected — no federal limit |
| Chlorine Total | Other | 0.4–2.5 mg/L (Reported level) | Jensen Plant | 4 mg/L (MCL) | Within the limit |
| TOC | Physical & aggregate | 2.3–2.5 mg/L (Reported level) | Diemer Plant | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 0.06 NTU (Reported level) | Mills Plant | No federal limit | Within the limit |
| Combined Radium | Radionuclides | 0–1 pCi/L (Reported level) | Skinner Plant | 0.019 pCi/L (Public health goal) | Within the limit |
| Gross Alpha | Radionuclides | 0–4 pCi/L (Reported level) | Mills Plant | 15 pCi/L (MCL) | Within the limit |
| Gross Beta Particle Activity | Radionuclides | 0–9 pCi/L (Reported level) | Diemer Plant | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | 0–3 pCi/L (Reported level) | Jensen Plant | 20 pCi/L (MCL) | Detected — no federal limit |

## What these contaminants are

- **Bromate** — A disinfection byproduct formed when bromide-containing water is treated with ozone. Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.
- **HAA5** — Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. Long-term exposure above the federal limit is associated with an increased cancer risk.
- **TTHM** — Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
- **Fluoride** — A mineral often added to drinking water to help prevent tooth decay. Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.
- **Nitrate** — A compound from fertilizer runoff, septic systems, and erosion of natural deposits. Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants.
- **Aluminum** — A common element sometimes used as a treatment coagulant. Regulated only as a secondary (cosmetic) standard; high levels can discolor water.
- **Arsenic** — A naturally occurring element that also enters water from industry and agriculture. A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
- **Barium** — A metal from erosion of natural deposits and industrial discharge. Long-term exposure above the federal limit can raise blood pressure.
- **Total Coliform** — A group of bacteria used as an indicator of overall water-system sanitation. Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.
- **TOC** — Total organic carbon — a measure of organic material dissolved in the water. Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.
- **Turbidity** — A measure of cloudiness from suspended particles in the water. High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.
- **Combined Radium** — Combined radium-226 and radium-228 — naturally occurring radioactive elements. Long-term exposure above the federal limit increases the risk of bone cancer.
- **Gross Alpha** — Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases cancer risk.
- **Gross Beta Particle Activity** — Gross beta particle activity — a combined measure of beta-emitting radioactive substances. Long-term exposure above the federal screening level increases cancer risk.
- **Uranium** — A naturally occurring radioactive metal from erosion of natural deposits. Long-term exposure above the federal limit can damage the kidneys and increase cancer risk.

## How to read this

- A water-quality report covers an entire service area, not a single address.
- 'Federal limit' is the EPA standard (MCL, action level, treatment technique, etc.) that the measured level is compared against.
- 'At or above the federal limit' means the utility's own reported figure met or exceeded that standard.

_Figures are the utility's own published numbers. Generated 2026-06-04 from thewatermap.com._