# Calvert Manor, MD — Drinking Water Quality (2024)

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

- Page: https://www.thewatermap.com/water/md/calvert-manor/2024
- JSON API: https://www.thewatermap.com/api/water/md/calvert-manor/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: 25
- Contaminants with a federal limit: 4
- Contaminants at or above the federal limit: 1
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Chlorine | Disinfectants | 0.5 mg/L (Reported level) | System-wide | No federal limit | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 1.35 ug/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| TTHM | Disinfection byproducts | 4.2 ug/L (Reported level) | System-wide | No federal limit | Detected — no federal limit |
| Fluoride | Inorganic chemicals | 1.06 mg/L (Reported level) | System-wide | 4 mg/L (MCLG) | Within the limit |
| Barium | Metals | 0.012 mg/L (Reported level) | System-wide | 2 mg/L (MCLG) | Within the limit |
| Copper | Metals | 0.22 (90th percentile) | At the tap | 0.135 (MCLG) | At or above the limit |
| Lead | Metals | 0 mg/L (90th percentile) | At the tap | 0.0008 mg/L (MCLG) | None detected |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Hexafluoropropylene oxide dimer acid | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| Perfluorobutanesulfonic acid | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluorodecanoic acid (PFDA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluorododecanoic acid (PFDoA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluoroheptanoic acid | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluorohexanesulfonic acid | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| Perfluorohexanoic acid | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| Perfluorononanoic acid | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluorotetradecanoic acid (PFTeDA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluorotridecanoic acid (PFTrDA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| Perfluoroundecanoic acid (PFUnA) | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | None detected |
| PFOA | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 2 Pg670013 | No federal limit | None detected |
| PFOS | PFAS ("forever chemicals") | Not detected (Reported level) | Calvert Manor 1 (New) Pg941402 | No federal limit | 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.
- **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.
- **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.
- **11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)** — 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. Monitored under EPA rules as part of broad PFAS surveillance.
- **4,8-Dioxa-3H-perfluorononanoic acid (ADONA)** — ADONA, a newer-generation PFAS replacement compound. Monitored under EPA rules as part of broad PFAS surveillance.
- **9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)** — 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. Monitored under EPA rules as part of broad PFAS surveillance.
- **Hexafluoropropylene oxide dimer acid** — HFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
- **N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)** — N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance.
- **N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)** — N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance.
- **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.
- **Perfluorodecanoic acid (PFDA)** — Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative.
- **Perfluorododecanoic acid (PFDoA)** — Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative.
- **Perfluoroheptanoic acid** — Perfluoroheptanoic acid, a PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment.
- **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.
- **Perfluorononanoic acid** — Perfluorononanoic acid, a PFAS 'forever chemical.' Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
- **Perfluorotetradecanoic acid (PFTeDA)** — Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative.
- **Perfluorotridecanoic acid (PFTrDA)** — Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative.
- **Perfluoroundecanoic acid (PFUnA)** — Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and bioaccumulative.
- **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.

## 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._