# Foothill Municipal Water Dist. — La Canada Flintridge, Ca, CA — Drinking Water Quality (2021)

> Contaminant levels for the Foothill Municipal Water Dist. — La Canada Flintridge, Ca, CA public water system from its 2021 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/foothill-municipal-water-dist-la-canada-flintridge-ca/2021
- JSON API: https://www.thewatermap.com/api/water/ca/foothill-municipal-water-dist-la-canada-flintridge-ca/2021
- 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: 2021
- Contaminants measured: 8
- Contaminants with a federal limit: 1
- 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 | 4.3–5.9 ug/L (Reported level) | Fm-1 | No federal limit | Within the limit |
| Nitrite | Inorganic chemicals | Not detected mg/L (Reported level) | Weymouth Effluent | 1 mg/L (MCL) | None detected |
| Cryptosporidium | Microbial | Not detected (Reported level) | Weymouth Effluent | No federal limit | None detected |
| Escherichia coli (E. coli) | Microbial | 0 (Reported level) | Weymouth Effluent | No federal limit | None detected |
| Giardia lamblia | Microbial | Not detected (Reported level) | Weymouth Effluent | No federal limit | None detected |
| Total Coliform | Microbial | 0 % (Reported level) | Fm-1 | No federal limit | None detected |
| Chlorine Total | Other | 2–2.7 mg/L (Reported level) | Fm-1 | No federal limit | Within the limit |
| Turbidity | Physical & aggregate | 0.03 NTU (Reported level) | Weymouth Effluent | No federal limit | Within the 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.
- **Nitrite** — A compound from fertilizer runoff, sewage, and erosion of natural deposits. Like nitrate, elevated levels can cause 'blue baby syndrome' in infants.
- **Escherichia coli (E. coli)** — Escherichia coli — bacteria found in the gut of humans and animals. Its presence in drinking water indicates fecal contamination and a real risk of waterborne illness.
- **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.
- **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.

## 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._