# Fair Oaks Water District — Fair Oaks, Ca, CA — Drinking Water Quality (2022)

> Contaminant levels for the Fair Oaks Water District — Fair Oaks, Ca, CA public water system from its 2022 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/fair-oaks-water-district-fair-oaks-ca/2022
- JSON API: https://www.thewatermap.com/api/water/ca/fair-oaks-water-district-fair-oaks-ca/2022
- 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: 2022
- Contaminants measured: 21
- Contaminants with a federal limit: 9
- 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 |
|---|---|---|---|---|---|
| HAA5 | Disinfection byproducts | 49.1 ug/L (Average) | San Juan Surface Water Including Orange Vale Water Company | No federal limit | Approaching the limit |
| Perchlorate | Disinfection byproducts | Not detected ug/L (Average) | Citrus Heights Groundwater | 1 ug/L (Public health goal) | Detected — no federal limit |
| TTHM | Disinfection byproducts | 60.1 ug/L (Average) | San Juan Surface Water Including Orange Vale Water Company | No federal limit | Within the limit |
| Bromide | Inorganic chemicals | 24.7 ug/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Fluoride | Inorganic chemicals | 0.1 mg/L (Average) | Citrus Heights Groundwater | 1 mg/L (Public health goal) | Within the limit |
| Nitrate | Inorganic chemicals | 2.5 mg/L (Average) | Citrus Heights Groundwater | 10 mg/L (Public health goal) | Within the limit |
| Arsenic | Metals | Not detected ug/L (Average) | San Juan Surface Water Including Orange Vale Water Company | 0.004 ug/L (Public health goal) | Within the limit |
| Barium | Metals | Not detected mg/L (Average) | Fair Oaks Groundwater | 2 mg/L (Public health goal) | Within the limit |
| Calcium | Metals | 30.5 mg/L (Average) | Citrus Heights Groundwater | No federal limit | Detected — no federal limit |
| Copper | Metals | 0.083 mg/L (90th percentile) | Citrus Heights Groundwater | 0.3 mg/L (Public health goal) | Within the limit |
| Lead | Metals | Not detected ug/L (90th percentile) | Fair Oaks Groundwater | 0.2 ug/L (Public health goal) | None detected |
| Magnesium | Metals | 14.3 mg/L (Average) | Citrus Heights Groundwater | No federal limit | Detected — no federal limit |
| Manganese | Metals | 1.9 ug/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Sodium | Metals | 20.3 mg/L (Average) | Citrus Heights Groundwater | No federal limit | Detected — no federal limit |
| Total Coliform | Microbial | 4.35 % (Maximum) | San Juan Surface Water Including Orange Vale Water Company | 0 % (Public health goal) | Detected — no federal limit |
| Chlorine Total | Other | 0.71 mg/L (Average) | Citrus Heights Groundwater | No federal limit | Within the limit |
| Alkalinity | Physical & aggregate | 130 mg/L (Average) | Citrus Heights Groundwater | No federal limit | Detected — no federal limit |
| Hardness | Physical & aggregate | 134.5 mg/L (Average) | Citrus Heights Groundwater | No federal limit | Detected — no federal limit |
| TOC | Physical & aggregate | 1.28 mg/L (Average) | San Juan Surface Water Including Orange Vale Water Company | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 100 % (Reported level) | San Juan Surface Water Including Orange Vale Water Company | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | Not detected pCi/L (Average) | Fair Oaks Groundwater | 0.43 pCi/L (Public health goal) | Detected — no federal limit |

## What these contaminants are

- **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.
- **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.
- **Bromide** — A naturally occurring salt found in source water. Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.
- **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.
- **Barium** — A metal from erosion of natural deposits and industrial discharge. Long-term exposure above the federal limit can raise blood pressure.
- **Calcium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **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.
- **Magnesium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and 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.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **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.
- **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.
- **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.
- **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.
- **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.

## 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._