# Coalinga-city — Coalinga, Ca, CA — Drinking Water Quality (2023)

> Contaminant levels for the Coalinga-city — Coalinga, Ca, CA public water system from its 2023 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/coalinga-city-coalinga-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/coalinga-city-coalinga-ca/2023
- 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: 2023
- Contaminants measured: 20
- Contaminants with a federal limit: 6
- 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 |
|---|---|---|---|---|---|
| Chloramine | Disinfectants | 2.5 mg/L (Average) | System-wide | 4 mg/L (MCL) | Within the limit |
| Chlorine | Disinfectants | 2 mg/L (Average) | System-wide | 4 mg/L (MCL) | Within the limit |
| HAA5 | Disinfection byproducts | 15 ug/L (Average) | System-wide | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 43 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Asbestos | Inorganic chemicals | 0.2 MFL (Average) | System-wide | 7 MFL (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.5 mg/L (Average) | System-wide | 10 mg/L (MCL) | Within the limit |
| Aluminum | Metals | 0.09 mg/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Chromium, Hexavalent | Metals | 0.08 ug/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Copper | Metals | 0.8 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | Not detected ug/L (90th percentile) | At the tap | No federal limit | None detected |
| Lithium | Metals | Not detected ug/L (Average) | System-wide | No federal limit | None detected |
| Escherichia coli (E. coli) | Microbial | 0 (Reported level) | Positive Detections in 2024 | No federal limit | None detected |
| Total Coliform | Microbial | 3 (Reported level) | Positive Detections in 2024 | No federal limit | Detected — no federal limit |
| PFAS | PFAS ("forever chemicals") | Not detected ug/L (Average) | System-wide | No federal limit | None detected |
| PFOA | PFAS ("forever chemicals") | Not detected ug/L (Average) | System-wide | No federal limit | None detected |
| PFOS | PFAS ("forever chemicals") | Not detected ug/L (Average) | System-wide | No federal limit | None detected |
| TOC | Physical & aggregate | 2.3 mg/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 0.2 (Average) | System-wide | No federal limit | Detected — no federal limit |
| Gross Alpha | Radionuclides | 2.5 pCi/L (Average) | System-wide | 15 pCi/L (MCL) | Within the limit |
| Gross Beta Particle Activity | Radionuclides | 4.3 pCi/L (Average) | System-wide | No federal limit | Detected — no federal limit |

## What these contaminants are

- **Chloramine** — A longer-lasting disinfectant made by combining chlorine with ammonia. Holds disinfection further into the pipe network, but is regulated under the same residual-disinfectant cap as chlorine.
- **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.
- **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.
- **Aluminum** — A common element sometimes used as a treatment coagulant. Regulated only as a secondary (cosmetic) standard; high levels can discolor water.
- **Chromium, Hexavalent** — Hexavalent chromium ('chromium-6') — the more toxic form of chromium. A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.
- **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.
- **Lithium** — A naturally occurring element found in some groundwater. No enforceable federal limit; on the EPA contaminant candidate list for further study.
- **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.
- **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.
- **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.
- **Gross Alpha** — Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases cancer risk.
- **Gross Beta Particle Activity** — Gross beta particle activity — a combined measure of beta-emitting radioactive substances. Long-term exposure above the federal screening level 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 2026-06-04 from thewatermap.com._