# Lynn, MA — Drinking Water Quality (2024)

> Contaminant levels for the Lynn, MA public water system from its 2024 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ma/lynn/2024
- JSON API: https://www.thewatermap.com/api/water/ma/lynn/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: 23
- Contaminants with a federal limit: 22
- Contaminants at or above the federal limit: 3
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Chlorine | Disinfectants | 1.2 mg/L (Reported level) | System-wide | 4 mg/L (MCL) | Within the limit |
| Chlorite | Disinfection byproducts | 0.4 mg/L (Reported level) | System-wide | 1 mg/L (MCL) | Within the limit |
| HAA5 | Disinfection byproducts | 27 ug/L (Reported level) | System-wide | 60 ug/L (MCL) | Within the limit |
| TTHM | Disinfection byproducts | 52 ug/L (Reported level) | System-wide | 80 ug/L (MCL) | Within the limit |
| Fluoride | Inorganic chemicals | 0.9 mg/L (Reported level) | System-wide | 2 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.16 mg/L (Reported level) | System-wide | 10 mg/L (MCL) | Within the limit |
| Sulfate | Inorganic chemicals | 22 mg/L (Reported level) | System-wide | 250 mg/L (MCLG) | Within the limit |
| Barium | Metals | 0.01 mg/L (Reported level) | System-wide | 2 mg/L (MCL) | Within the limit |
| Copper | Metals | 0.1 mg/L (Reported level) | System-wide | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | 2.4 ug/L (Reported level) | System-wide | 15 ug/L (Action level) | Within the limit |
| Nickel | Metals | 3 ug/L (Reported level) | System-wide | 100 ug/L (MCL) | Within the limit |
| Sodium | Metals | 76 mg/L (Reported level) | System-wide | 20 mg/L (MCL) | At or above the limit |
| Perfluorobutanesulfonic acid | PFAS ("forever chemicals") | 2 ng/L (Reported level) | System-wide | 0 ng/L (MCLG) | Detected — no federal limit |
| Perfluorohexanesulfonic acid | PFAS ("forever chemicals") | 1.9 ng/L (Reported level) | System-wide | 10 ng/L (MCL) | Within the limit |
| Perfluorohexanoic acid | PFAS ("forever chemicals") | 3.4 ng/L (Reported level) | System-wide | 0 ng/L (MCLG) | Detected — no federal limit |
| Perfluoropentanoic acid | PFAS ("forever chemicals") | 5.2 ng/L (Reported level) | System-wide | 0 ng/L (MCLG) | Detected — no federal limit |
| PFAS | PFAS ("forever chemicals") | 8.4 ng/L (Reported level) | System-wide | 20 ng/L (MCL) | Within the limit |
| PFBA | PFAS ("forever chemicals") | 5.4 ng/L (Reported level) | System-wide | 0 ng/L (MCLG) | Detected — no federal limit |
| PFOA | PFAS ("forever chemicals") | 3 ng/L (Reported level) | System-wide | 4 ng/L (MCL) | Within the limit |
| PFOS | PFAS ("forever chemicals") | 4.2 ng/L (Reported level) | System-wide | 4 ng/L (MCL) | At or above the limit |
| Hardness | Physical & aggregate | 55 mg/L (Reported level) | System-wide | No federal limit | Detected — no federal limit |
| Combined Radium | Radionuclides | 0.44–11 pCi/L (Reported level) | System-wide | 5 pCi/L (MCL) | At or above the limit |
| Gross Alpha | Radionuclides | 0.736–1.18 pCi/L (Reported level) | System-wide | 15 pCi/L (MCL) | Within the 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.
- **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.
- **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.
- **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.
- **Barium** — A metal from erosion of natural deposits and industrial discharge. Long-term exposure above the federal limit can raise blood pressure.
- **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.
- **Nickel** — A metal from natural deposits and industrial discharge. Long-term exposure can cause skin and other effects; monitored under EPA rules.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **Perfluorobutanesulfonic acid** — Perfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' Has no standalone limit but is part of the EPA PFAS Hazard Index that limits PFAS in combination.
- **Perfluorohexanesulfonic acid** — Perfluorohexanesulfonic acid, a PFAS 'forever chemical.' Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
- **Perfluorohexanoic acid** — Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and widely detected.
- **Perfluoropentanoic acid** — Perfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment.
- **PFBA** — Perfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment and the human body.
- **PFOA** — Perfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. Linked to cancer, liver damage, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
- **PFOS** — Perfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
- **Hardness** — A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.
- **Combined Radium** — Combined radium-226 and radium-228 — naturally occurring radioactive elements. Long-term exposure above the federal limit increases the risk of bone cancer.
- **Gross Alpha** — Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases 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 2026-05-25 from thewatermap.com._