# City of Alpharetta, GA — Drinking Water Quality (2024)

> Contaminant levels for the City of Alpharetta, GA public water system from its 2024 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ga/alpharetta/2024
- JSON API: https://www.thewatermap.com/api/water/ga/alpharetta/2024
- 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: 2024
- Contaminants measured: 5
- 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 | 0.02–1.62 mg/L (Range) | System-wide | 4 mg/L (MRDL) | Within the limit |
| TTHM | Disinfection byproducts | 73.2 ug/L (Average) | Level Detected Average | 80 ug/L (MCL) | Approaching the limit |
| Nitrate | Inorganic chemicals | 0.49 (Maximum) | System-wide | 10 (MRDL) | Within the limit |
| Lead | Metals | 1.9 ug/L (90th percentile) | At the tap | 15 ug/L (MCLG) | Within the limit |
| Escherichia coli (E. coli) | Microbial | 0 (Highest single sample) | Number of Positive Samples Reported | 0 (MCL) | None detected |

## 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.
- **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.
- **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.
- **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.
- **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.

## 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 2026-05-25 from thewatermap.com._