# La Verne, City Wd — La Verne, Ca, CA — Drinking Water Quality (2020)

> Contaminant levels for the La Verne, City Wd — La Verne, Ca, CA public water system from its 2020 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/la-verne-city-wd-la-verne-ca/2020
- JSON API: https://www.thewatermap.com/api/water/ca/la-verne-city-wd-la-verne-ca/2020
- 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: 2020
- Contaminants measured: 16
- Contaminants with a federal limit: 9
- Contaminants at or above the federal limit: 2
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Perchlorate | Disinfection byproducts | 0–19 ug/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | No federal limit | Detected — no federal limit |
| TTHM | Disinfection byproducts | 25.4–37.61 ug/L (Reported level) | Miramar Plant (73%) | No federal limit | Within the limit |
| Fluoride | Inorganic chemicals | 0.18–0.34 mg/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0–25 mg/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | 10 mg/L (MCL) | At or above the limit |
| Chromium, Hexavalent | Metals | Not detected ug/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | No federal limit | None detected |
| Copper | Metals | 0.084 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | 11 ug/L (90th percentile) | At the tap | No federal limit | Within the limit |
| Escherichia coli (E. coli) | Microbial | 0 (Reported level) | Miramar | 0 (Public health goal) | None detected |
| Total Coliform | Microbial | 0 (Reported level) | System Water | 0 (Public health goal) | None detected |
| Dichloroethane 12 | Other | 0–0.32 ug/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | No federal limit | Within the limit |
| Turbidity | Physical & aggregate | Not detected NTU (Reported level) | Miramar Plant (73%) | No federal limit | None detected |
| Combined Radium | Radionuclides | 0.88 % (Reported level) | Miramar Plant (73%) | 0.05 % (Public health goal) | Detected — no federal limit |
| Gross Beta Particle Activity | Radionuclides | 3.35–3.82 pCi/L (Reported level) | Miramar Plant (73%) | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | 3.5–4.7 pCi/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | 20 pCi/L (MCL) | Detected — no federal limit |
| Tetrachloroethylene | VOCs & pesticides | 0–0.73 ug/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | 5 ug/L (MCL) | Within the limit |
| Trichloroethylene | VOCs & pesticides | 0–16 ug/L (Reported level) | Groundwater (27%) (Raw Water) (Range/Average) | 5 ug/L (MCL) | At or above the limit |

## What these contaminants are

- **Perchlorate** — A chemical used in rocket fuel and fireworks that can also form during disinfection. Can interfere with thyroid hormone production; has no national enforceable limit but is regulated in some states.
- **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.
- **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.
- **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.
- **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 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.
- **Tetrachloroethylene** — An industrial solvent (PCE) used in dry cleaning and degreasing. A likely human carcinogen; long-term exposure above the federal limit can damage the liver and kidneys.
- **Trichloroethylene** — An industrial solvent (TCE) used in metal degreasing. A known human carcinogen; long-term exposure above the federal limit can damage the liver.

## 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._