# Glenbrook Cove Subdivision of Marion, IA — Drinking Water Quality (2024)

> Contaminant levels for the Glenbrook Cove Subdivision of Marion, IA public water system from its 2024 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ia/glenbrook-cove-subdivision-of-marion/2024
- JSON API: https://www.thewatermap.com/api/water/ia/glenbrook-cove-subdivision-of-marion/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: 18
- Contaminants with a federal limit: 8
- 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 | 1.9–3.8 mg/L (Range) | System-wide | 4 mg/L (MRDL) | Approaching the limit |
| TTHM | Disinfection byproducts | 0–3.9 ug/L (Range) | System-wide | 80 ug/L (MCL) | Within the limit |
| Fluoride | Inorganic chemicals | 0.1–0.8 mg/L (Range) | J Ave. Plant | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 9 mg/L (Reported level) | Nw Plant | 10 mg/L (MCL) | Approaching the limit |
| Nitrite | Inorganic chemicals | 0.1 mg/L (Reported level) | Nw Plant | 1 mg/L (MCL) | Within the limit |
| Arsenic | Metals | 2.7 (Reported level) | 2020 Annual Average | No federal limit | Detected — no federal limit |
| Copper | Metals | 0.071 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Iron | Metals | 410 (Reported level) | 2022 Annual Average | No federal limit | Detected — no federal limit |
| Lead | Metals | 2.6 ug/L (90th percentile) | At the tap | 15 ug/L (Action level) | Within the limit |
| Manganese | Metals | 479 (Reported level) | 2021 Annual Average | No federal limit | Detected — no federal limit |
| Sodium | Metals | 16.4 (Reported level) | 2024 Annual Average | No federal limit | Detected — no federal limit |
| Zinc | Metals | 9.8 (Reported level) | 2024 Annual Average | No federal limit | Detected — no federal limit |
| Escherichia coli (E. coli) | Microbial | Not detected (Reported level) | 2024 Annual Average | No federal limit | None detected |
| Total Coliform | Microbial | 16 (Reported level) | 2023 Annual Average | No federal limit | Detected — no federal limit |
| TOC | Physical & aggregate | 1.6–3.5 (Range) | Nw Plant | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 0.02–3.07 NTU (Range) | Nw Plant | No federal limit | Detected — no federal limit |
| Radon | Radionuclides | 297 (Reported level) | 2020 Annual Average | No federal limit | Detected — no federal limit |
| Atrazine | VOCs & pesticides | 0–0.5 ug/L (Range) | J Ave. Plant | 3 ug/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.
- **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.
- **Nitrite** — A compound from fertilizer runoff, sewage, and erosion of natural deposits. Like nitrate, elevated levels can cause 'blue baby syndrome' 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.
- **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.
- **Iron** — A naturally occurring metal common in groundwater. Regulated only as a secondary (cosmetic) standard; causes rusty color, staining, and metallic taste.
- **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.
- **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.
- **Zinc** — A naturally occurring metal that can also enter water from corroding pipes. Regulated only as a secondary (cosmetic) standard; high levels cause a metallic taste.
- **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.
- **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.
- **Radon** — A naturally occurring radioactive gas that can dissolve into groundwater. No enforceable federal limit in drinking water yet; inhalation of released radon raises lung-cancer risk.
- **Atrazine** — A widely used agricultural herbicide that reaches water through runoff. Long-term exposure above the federal limit can affect the cardiovascular and reproductive systems.

## 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._