# City of Pittsburg, CA — Drinking Water Quality (2025)

> Contaminant levels for the City of Pittsburg, CA public water system from its 2025 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/pittsburg/2025
- JSON API: https://www.thewatermap.com/api/water/ca/pittsburg/2025
- 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: 2025
- Contaminants measured: 27
- Contaminants with a federal limit: 16
- 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 |
|---|---|---|---|---|---|
| Bromodichloromethane | Disinfection byproducts | 15.666666666666666 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Bromoform | Disinfection byproducts | 9.216666666666667 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Chloroform | Disinfection byproducts | 8.154166666666667 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Dibromochloromethane | Disinfection byproducts | 20.166666666666668 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 11.929166666666667 UG/L (Average) | Distribution | 60 UG/L (MCL) | Within the limit |
| TTHM | Disinfection byproducts | 53.333333333333336 UG/L (Average) | Distribution | 80 UG/L (MCL) | Within the limit |
| Sulfate | Inorganic chemicals | 67.5 MG/L (Average) | Entry point | 500 MG/L (MCL) | Within the limit |
| Aluminum | Metals | 35.333333333333336 UG/L (Average) | Entry point | 1000 UG/L (MCL) | Within the limit |
| Calcium | Metals | Not detected MG/L (Highest single sample) | Source water | No federal limit | None detected |
| Iron | Metals | Not detected UG/L (Highest single sample) | Entry point | 300 UG/L (MCL) | None detected |
| Manganese | Metals | 3.6666666666666665 UG/L (Average) | Entry point | 50 UG/L (MCL) | Within the limit |
| Chlordane | Other | Not detected UG/L (Highest single sample) | Source water | 0.1 UG/L (MCL) | None detected |
| Dbaa | Other | 3.454166666666667 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Dcaa | Other | 4.75 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Endrin | Other | Not detected UG/L (Highest single sample) | Source water | 2 UG/L (MCL) | None detected |
| Heptachlor | Other | Not detected UG/L (Highest single sample) | Source water | 0.01 UG/L (MCL) | None detected |
| Heptachlor Epoxide | Other | Not detected UG/L (Highest single sample) | Source water | 0.01 UG/L (MCL) | None detected |
| Mbaa | Other | 0.7916666666666666 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Mcaa | Other | Not detected UG/L (Highest single sample) | Distribution | No federal limit | None detected |
| Methoxychlor | Other | Not detected UG/L (Highest single sample) | Source water | 30 UG/L (MCL) | None detected |
| Pcb Total | Other | Not detected UG/L (Highest single sample) | Source water | 0.5 UG/L (MCL) | None detected |
| Tcaa | Other | 3.3874999999999997 UG/L (Average) | Distribution | No federal limit | Detected — no federal limit |
| Toxaphene | Other | Not detected UG/L (Highest single sample) | Source water | 3 UG/L (MCL) | None detected |
| Alkalinity | Physical & aggregate | 52.4 MG/L (Average) | Source water | No federal limit | Detected — no federal limit |
| Color | Physical & aggregate | Not detected UNITS (Highest single sample) | Entry point | 15 UNITS (MCL) | None detected |
| Total Dissolved Solids | Physical & aggregate | 360 MG/L (Average) | Entry point | 1000 MG/L (MCL) | Within the limit |
| Xylenes | VOCs & pesticides | Not detected UG/L (Highest single sample) | Other | 1750 UG/L (MCL) | None detected |

## What these contaminants are

- **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.
- **Sulfate** — A naturally occurring mineral from rock and soil. No health-based federal limit; high levels can have a laxative effect and a bitter taste.
- **Aluminum** — A common element sometimes used as a treatment coagulant. Regulated only as a secondary (cosmetic) standard; high levels can discolor water.
- **Calcium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **Iron** — A naturally occurring metal common in groundwater. Regulated only as a secondary (cosmetic) standard; causes rusty color, staining, and metallic taste.
- **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.
- **Alkalinity** — A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
- **Color** — A measure of visible tint in the water. Regulated only as a secondary (cosmetic) standard.
- **Total Dissolved Solids** — Total dissolved solids — the combined content of all dissolved minerals and salts. Regulated only as a secondary (cosmetic) standard; high levels affect taste and hardness.
- **Xylenes** — A group of industrial solvents found in gasoline and paint. Long-term exposure above the federal limit can damage the nervous system.

## 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 2026-05-26 from thewatermap.com._