# Joshua Basin Water District — Joshua Tree, Ca, CA — Drinking Water Quality (2023)

> Contaminant levels for the Joshua Basin Water District — Joshua Tree, Ca, CA public water system from its 2023 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/joshua-basin-water-district-joshua-tree-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/joshua-basin-water-district-joshua-tree-ca/2023
- 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: 2023
- Contaminants measured: 16
- Contaminants with a federal limit: 5
- 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 |
|---|---|---|---|---|---|
| Chlorine | Disinfectants | 0.54–1.1 mg/L (Range) | System-wide | No federal limit | Within the limit |
| Bromodichloromethane | Disinfection byproducts | 0–3.1 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Bromoform | Disinfection byproducts | 0–14 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Chloroform | Disinfection byproducts | 0–1 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Dibromochloromethane | Disinfection byproducts | 0–8.5 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 0–2.2 ug/L (Range) | System-wide | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 6.5–27 ug/L (Range) | System-wide | No federal limit | Within the limit |
| Fluoride | Inorganic chemicals | 0.46–0.83 mg/L (Range) | System-wide | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.0021–0.0061 mg/L (Range) | System-wide | 10 mg/L (MCL) | Within the limit |
| Arsenic | Metals | 0–4.9 ug/L (Range) | System-wide | No federal limit | Within the limit |
| Chromium, Hexavalent | Metals | 25–35 ug/L (Range) | System-wide | 0.02 ug/L (Public health goal) | Detected — no federal limit |
| Chromium, Total | Metals | 12–37 ug/L (Range) | System-wide | No federal limit | Within the limit |
| Copper | Metals | 0.061 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | Not detected ug/L (90th percentile) | At the tap | No federal limit | None detected |
| Sodium | Metals | 37–60 mg/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Gross Alpha | Radionuclides | 1.74 pCi/L (Reported level) | System-wide | 15 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.
- **Bromodichloromethane** — A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with cancer and reproductive effects.
- **Bromoform** — A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with liver and kidney effects.
- **Chloroform** — A trihalomethane formed when chlorine reacts with organic matter in water. A component of regulated total trihalomethanes; long-term exposure is linked to liver and kidney effects.
- **Dibromochloromethane** — A trihalomethane disinfection byproduct. Part of regulated total trihalomethanes; long-term exposure is linked to nervous-system, liver, and kidney effects.
- **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.
- **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.
- **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.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **Gross Alpha** — Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases 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._