# Quartz Hill Water Dist. — Quartz Hill, Ca, CA — Drinking Water Quality (2020)

> Contaminant levels for the Quartz Hill Water Dist. — Quartz Hill, Ca, CA public water system from its 2020 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/quartz-hill-water-dist-quartz-hill-ca/2020
- JSON API: https://www.thewatermap.com/api/water/ca/quartz-hill-water-dist-quartz-hill-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: 13
- Contaminants with a federal limit: 5
- 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 |
|---|---|---|---|---|---|
| Chlorine | Disinfectants | 0.27–1.25 mg/L (Range) | System-wide | No federal limit | Within the limit |
| HAA5 | Disinfection byproducts | 0–17.4 ug/L (Range) | System-wide | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 0–76.7 ug/L (Range) | System-wide | No federal limit | Approaching the limit |
| Fluoride | Inorganic chemicals | 0.045–0.72 mg/L (Range) | System-wide | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.89–8.6 mg/L (Range) | System-wide | 10 mg/L (MCL) | Approaching the limit |
| Arsenic | Metals | 0–16.2 ug/L (Range) | System-wide | No federal limit | At or above the limit |
| Boron | Metals | 0–110 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Chromium, Hexavalent | Metals | 7.6–15 ug/L (Range) | System-wide | 0.02 ug/L (Public health goal) | Detected — no federal limit |
| Chromium, Total | Metals | 0–11 ug/L (Range) | System-wide | No federal limit | Within the limit |
| Copper | Metals | 0.36 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Sodium | Metals | 59–77 mg/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Vanadium | Metals | 14–17 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Combined Radium | Radionuclides | 0–0.41 pCi/L (Range) | System-wide | 5 pCi/L (MCL) | Within the limit |

## What these contaminants are

- **Chlorine** — A disinfectant added to drinking water to kill bacteria and viruses. Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant 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.
- **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.
- **Boron** — A naturally occurring element from rock and soil. No enforceable federal limit; the EPA has issued a health advisory level.
- **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.
- **Chromium, Total** — Total chromium — the sum of all chromium forms, from natural deposits and industrial discharge. Long-term exposure above the federal limit can cause allergic dermatitis; includes hexavalent chromium.
- **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.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **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.

## 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._