# City of Woodland — Woodland, Ca, CA — Drinking Water Quality (2023)

> Contaminant levels for the City of Woodland — Woodland, Ca, CA public water system from its 2023 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/woodland-woodland-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/woodland-woodland-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: 18
- Contaminants with a federal limit: 3
- 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 | 0.3–1.46 mg/L (Range) | System-wide | No federal limit | Within the limit |
| Chlorate | Disinfection byproducts | 72–160 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 0–27 ug/L (Range) | System-wide | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 7.7–40 ug/L (Range) | System-wide | No federal limit | Within the limit |
| Aluminum | Metals | 0–0.052 mg/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Barium | Metals | 0.024 mg/L (Reported level) | System-wide | 2 mg/L (MCL) | Within the limit |
| Boron | Metals | 220–360 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Calcium | Metals | 11–16 mg/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Chromium, Hexavalent | Metals | 0.09 ug/L (Reported level) | System-wide | 0.02 ug/L (Public health goal) | Detected — no federal limit |
| Copper | Metals | 0.32 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 | Within the limit |
| Lithium | Metals | 0–46.1 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Magnesium | Metals | 6.5 ug/L (Reported level) | System-wide | No federal limit | Detected — no federal limit |
| Sodium | Metals | 13 ug/L (Reported level) | System-wide | No federal limit | Detected — no federal limit |
| Alkalinity | Physical & aggregate | 67–83 mg/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Hardness | Physical & aggregate | 59–77 mg/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| pH | Physical & aggregate | 7.9–8 (Range) | System-wide | No federal limit | Detected — no federal limit |
| TOC | Physical & aggregate | 0.63–2.6 mg/L (Range) | System-wide | No federal limit | Detected — no federal 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.
- **Chlorate** — A byproduct that can form during disinfection, especially when hypochlorite solutions degrade. Has no enforceable federal limit but is on the EPA contaminant candidate list; high levels can affect the thyroid.
- **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.
- **Aluminum** — A common element sometimes used as a treatment coagulant. Regulated only as a secondary (cosmetic) standard; high levels can discolor water.
- **Barium** — A metal from erosion of natural deposits and industrial discharge. Long-term exposure above the federal limit can raise blood pressure.
- **Boron** — A naturally occurring element from rock and soil. No enforceable federal limit; the EPA has issued a health advisory level.
- **Calcium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **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.
- **Lithium** — A naturally occurring element found in some groundwater. No enforceable federal limit; on the EPA contaminant candidate list for further study.
- **Magnesium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **Alkalinity** — A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
- **Hardness** — A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.
- **pH** — A measure of how acidic or basic the water is. Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.
- **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.

## 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._