# Delano, City of — Delano, Ca, CA — Drinking Water Quality (2023)

> Contaminant levels for the Delano, City of — Delano, Ca, CA public water system from its 2023 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/delano-delano-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/delano-delano-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: 33
- Contaminants with a federal limit: 4
- Contaminants at or above the federal limit: 11
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Chlorine | Disinfectants | 1.33–2.98 mg/L (Range) | System-wide | 4 mg/L (MCL) | Within the limit |
| HAA5 | Disinfection byproducts | 3.5 ug/L (Average) | System-wide | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 13.31 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Nitrate | Inorganic chemicals | 0.98 mg/L (Average) | System-wide | 10 mg/L (MCL) | Within the limit |
| Arsenic | Metals | 5.44 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Copper | Metals | 0.01 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | 0 ug/L (90th percentile) | At the tap | No federal limit | Within the limit |
| Lithium | Metals | 4.23 (Average) | System-wide | No federal limit | Detected — no federal limit |
| Cryptosporidium | Microbial | 3 (Highest single sample) | No. of Detections | No federal limit | Detected — no federal limit |
| Escherichia coli (E. coli) | Microbial | 0 (Reported level) | Total No. of Detections | No federal limit | None detected |
| Total Coliform | Microbial | 1 (Highest single sample) | No. of Detections | No federal limit | Detected — no federal limit |
| Carbon Tetrachloride | Other | 500 ng/L (Average) | System-wide | No federal limit | Within the limit |
| Chromium | Other | 3.84 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Dichloroethane 12 | Other | 5 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Diquat | Other | 20 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Edb | Other | 0 ng/L (Reported level) | System-wide | 5000000 ng/L (MCL) | None detected |
| Endothall | Other | 100 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Glyphosate | Other | 700 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Heptachlor | Other | 10 ng/L (Average) | System-wide | No federal limit | Within the limit |
| Heptachlor Epoxide | Other | 10 ng/L (Average) | System-wide | No federal limit | Within the limit |
| Hexachlorobenzene | Other | 1 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Hexachlorocyclopentadiene | Other | 50 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Lindane | Other | 200 ng/L (Average) | System-wide | No federal limit | Approaching the limit |
| Methoxychlor | Other | 30 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Oxamyl | Other | 50 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Pcb Total | Other | 500 ng/L (Average) | System-wide | No federal limit | At or above the limit |
| Pentachlorophenol | Other | 1 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Picloram | Other | 500 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| Toxaphene | Other | 3 ug/L (Average) | System-wide | No federal limit | At or above the limit |
| 1,2,3-TCP | VOCs & pesticides | 0–0.27 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Benzene | VOCs & pesticides | 1 ug/L (Average) | System-wide | No federal limit | Within the limit |
| DBCP | VOCs & pesticides | 0–80 ng/L (Range) | System-wide | No federal limit | Within the limit |
| Simazine | VOCs & pesticides | 4 ug/L (Average) | System-wide | No federal limit | At or above 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.
- **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.
- **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.
- **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.
- **DBCP** — 1,2-dibromo-3-chloropropane — a banned soil fumigant pesticide. A probable human carcinogen; long-term exposure above the federal limit can cause reproductive harm.

## 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._