# Lomita-city, Water Dept. — Lomita, Ca, CA — Drinking Water Quality (2022)

> Contaminant levels for the Lomita-city, Water Dept. — Lomita, Ca, CA public water system from its 2022 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/lomita-city-water-dept-lomita-ca/2022
- JSON API: https://www.thewatermap.com/api/water/ca/lomita-city-water-dept-lomita-ca/2022
- 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: 2022
- Contaminants measured: 29
- Contaminants with a federal limit: 17
- Contaminants at or above the federal limit: 0
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Bromate | Disinfection byproducts | 3.3 ug/L (Average) | MWD Surface Water | No federal limit | Within the limit |
| Bromodichloroacetic acid | Disinfection byproducts | 0.6 ug/L (Average) | City of Lomita Groundwater & Distribution | No federal limit | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 19 ug/L (Average) | MWD Surface Water | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 50 ug/L (Average) | MWD Surface Water | No federal limit | Within the limit |
| Bromochloroacetic acid | Inorganic chemicals | 2.57 ug/L (Average) | City of Lomita Groundwater & Distribution | 60 ug/L (MCL) | Within the limit |
| Chlorodibromoacetic acid | Inorganic chemicals | 0.6 ug/L (Average) | City of Lomita Groundwater & Distribution | 60 ug/L (MCL) | Within the limit |
| Dibromoacetic acid | Inorganic chemicals | 2.7 ug/L (Average) | City of Lomita Groundwater & Distribution | 60 ug/L (MCL) | Within the limit |
| Dichloroacetic acid | Inorganic chemicals | 2.9 ug/L (Average) | City of Lomita Groundwater & Distribution | 60 ug/L (MCL) | Within the limit |
| Fluoride | Inorganic chemicals | 0.7 mg/L (Average) | MWD Surface Water | 4 mg/L (MCL) | Within the limit |
| Monobromoacetic acid | Inorganic chemicals | 0.37 ug/L (Average) | City of Lomita Groundwater & Distribution | 60 ug/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.8 mg/L (Average) | MWD Surface Water | 10 mg/L (MCL) | Within the limit |
| Trichloroacetic acid | Inorganic chemicals | 0.73 ug/L (Average) | City of Lomita Groundwater & Distribution | 60 ug/L (MCL) | Within the limit |
| Aluminum | Metals | 73.3 ug/L (Average) | MWD Surface Water | No federal limit | Detected — no federal limit |
| Arsenic | Metals | Not detected ug/L (Average) | MWD Surface Water | No federal limit | None detected |
| Barium | Metals | Not detected ug/L (Average) | MWD Surface Water | 2000 ug/L (MCL) | None detected |
| Chromium, Hexavalent | Metals | Not detected ug/L (Range) | MWD Surface Water | 0.02 ug/L (Public health goal) | None detected |
| Copper | Metals | 0.09 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | 3.04 ug/L (90th percentile) | At the tap | No federal limit | Within the limit |
| Manganese | Metals | 1.5 ug/L (Average) | City of Lomita Groundwater & Distribution | No federal limit | Detected — no federal limit |
| Escherichia coli (E. coli) | Microbial | 0 (Average) | MWD Surface Water | 0 (Public health goal) | None detected |
| Giardia lamblia | Microbial | Not detected (Range) | MWD Surface Water | No federal limit | None detected |
| Total Coliform | Microbial | 0.1 (Average) | MWD Surface Water | 0 (Public health goal) | Detected — no federal limit |
| Chlorine Total | Other | 2.5 mg/L (Average) | MWD Surface Water | 4 mg/L (MCL) | Within the limit |
| TOC | Physical & aggregate | 2.3 mg/L (Average) | MWD Surface Water | No federal limit | Detected — no federal limit |
| Combined Radium | Radionuclides | Not detected pCi/L (Range) | MWD Surface Water | 0.019 pCi/L (Public health goal) | None detected |
| Gross Alpha | Radionuclides | Not detected pCi/L (Average) | MWD Surface Water | 15 pCi/L (MCL) | Within the limit |
| Gross Beta Particle Activity | Radionuclides | Not detected pCi/L (Average) | MWD Surface Water | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | 1 pCi/L (Average) | MWD Surface Water | 20 pCi/L (MCL) | Detected — no federal limit |
| Benzene | VOCs & pesticides | Not detected ug/L (Range) | MWD Surface Water | No federal limit | None detected |

## 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.
- **Bromodichloroacetic acid** — A brominated haloacetic acid disinfection byproduct. Part of the broader HAA9 group; monitored but without its own enforceable federal limit.
- **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.
- **Bromochloroacetic acid** — A mixed-halogen haloacetic acid disinfection byproduct. Part of the broader HAA9 group; monitored without its own enforceable limit.
- **Chlorodibromoacetic acid** — A brominated haloacetic acid disinfection byproduct. Part of the broader HAA9 group; monitored but without its own enforceable federal limit.
- **Dibromoacetic acid** — A brominated haloacetic acid disinfection byproduct. Part of the broader HAA9 group; monitored without its own enforceable limit.
- **Dichloroacetic acid** — A haloacetic acid disinfection byproduct. One of the five haloacetic acids regulated together as HAA5 for 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.
- **Monobromoacetic acid** — A brominated haloacetic acid disinfection byproduct. Part of the broader HAA9 group; monitored without its own enforceable limit.
- **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.
- **Trichloroacetic acid** — A haloacetic acid disinfection byproduct. One of the five haloacetic acids regulated together as HAA5.
- **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.
- **Chromium, Hexavalent** — Hexavalent chromium ('chromium-6') — the more toxic form of chromium. A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.
- **Copper** — A metal that enters water from corroding household plumbing. Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.
- **Lead** — A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.
- **Manganese** — A naturally occurring metal from soil and rock. No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.
- **Escherichia coli (E. coli)** — Escherichia coli — bacteria found in the gut of humans and animals. Its presence in drinking water indicates fecal contamination and a real risk of waterborne illness.
- **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.
- **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._