# Yucaipa Valley Water District — Yucaipa, Ca, CA — Drinking Water Quality (2023)

> Contaminant levels for the Yucaipa Valley Water District — Yucaipa, Ca, CA public water system from its 2023 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/yucaipa-valley-water-district-yucaipa-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/yucaipa-valley-water-district-yucaipa-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: 24
- Contaminants with a federal limit: 13
- 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 mg/L (Average) | System-wide | 4 mg/L (MCL) | Within the limit |
| Bromodichloromethane | Disinfection byproducts | 10.88 ug/L (Average) | System-wide | 0.06 ug/L (Public health goal) | Detected — no federal limit |
| Bromoform | Disinfection byproducts | 8.67 ug/L (Average) | System-wide | 0.5 ug/L (Public health goal) | Detected — no federal limit |
| Chloroform | Disinfection byproducts | 4.6 ug/L (Average) | System-wide | 0.4 ug/L (Public health goal) | Detected — no federal limit |
| Dibromochloromethane | Disinfection byproducts | 18.55 ug/L (Average) | System-wide | 0.1 ug/L (Public health goal) | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 7.62 ug/L (Average) | System-wide | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 43.26 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Dibromoacetic acid | Inorganic chemicals | 4.44 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Dichloroacetic acid | Inorganic chemicals | 2.23 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Fluoride | Inorganic chemicals | 0.3 mg/L (Average) | System-wide | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 1.7 mg/L (Average) | System-wide | 10 mg/L (MCL) | Within the limit |
| Trichloroacetic acid | Inorganic chemicals | 0.95 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Arsenic | Metals | 1.3 ug/L (Average) | System-wide | No federal limit | Within the limit |
| Chromium, Hexavalent | Metals | 1.4 ug/L (Average) | System-wide | 0.02 ug/L (Public health goal) | Detected — no federal limit |
| Escherichia coli (E. coli) | Microbial | Not detected (Range) | System-wide | 0 (Public health goal) | None detected |
| Total Coliform | Microbial | 0 (Average) | System-wide | 0 (Public health goal) | None detected |
| Perfluorobutanesulfonic acid | PFAS ("forever chemicals") | 0.0002 ng/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Perfluorohexanoic acid | PFAS ("forever chemicals") | 0.0001 ng/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Perfluoropentanoic acid | PFAS ("forever chemicals") | 0.0001 ng/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| PFOA | PFAS ("forever chemicals") | 0.00007 ng/L (Average) | System-wide | 4 ng/L (MCL) | Within the limit |
| TOC | Physical & aggregate | 0.4 mg/L (Average) | System-wide | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 0.04 (Reported level) | Yucaipa Valley Regional Water Filtration Facility (Microfiltration and Nanofiltration) | No federal limit | Detected — no federal limit |
| Gross Alpha | Radionuclides | 0.01 pCi/L (Average) | System-wide | 15 pCi/L (MCL) | Within the limit |
| Uranium | Radionuclides | 1.5 pCi/L (Average) | System-wide | 20 pCi/L (MCL) | Detected — no federal 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.
- **Bromodichloromethane** — A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with cancer and reproductive effects.
- **Bromoform** — A trihalomethane disinfection byproduct. Counted within regulated total trihalomethanes; long-term exposure is associated with liver and kidney effects.
- **Chloroform** — A trihalomethane formed when chlorine reacts with organic matter in water. A component of regulated total trihalomethanes; long-term exposure is linked to liver and kidney effects.
- **Dibromochloromethane** — A trihalomethane disinfection byproduct. Part of regulated total trihalomethanes; long-term exposure is linked to nervous-system, liver, and kidney effects.
- **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.
- **Dibromoacetic acid** — A brominated haloacetic acid disinfection byproduct. Part of the broader HAA9 group; monitored without its own enforceable limit.
- **Dichloroacetic acid** — A haloacetic acid disinfection byproduct. One of the five haloacetic acids regulated together as HAA5 for 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.
- **Trichloroacetic acid** — A haloacetic acid disinfection byproduct. One of the five haloacetic acids regulated together as HAA5.
- **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.
- **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.
- **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.
- **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.
- **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.
- **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.
- **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.
- **Uranium** — A naturally occurring radioactive metal from erosion of natural deposits. Long-term exposure above the federal limit can damage the kidneys and increase 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._