# South Montebello Irrigation Dist. — Montebello, Ca, CA — Drinking Water Quality (2022)

> Contaminant levels for the South Montebello Irrigation Dist. — Montebello, Ca, CA public water system from its 2022 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/south-montebello-irrigation-dist-montebello-ca/2022
- JSON API: https://www.thewatermap.com/api/water/ca/south-montebello-irrigation-dist-montebello-ca/2022
- 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: 2022
- Contaminants measured: 15
- 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 |
|---|---|---|---|---|---|
| HAA5 | Disinfection byproducts | 2.7 ug/L (Average) | Distribution System | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 17 ug/L (Average) | Distribution System | No federal limit | Within the limit |
| Fluoride | Inorganic chemicals | 0.28 mg/L (Average) | Groundwater | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0.81 mg/L (Average) | Groundwater | 10 mg/L (MCL) | Within the limit |
| Arsenic | Metals | 2 ug/L (Average) | Groundwater | No federal limit | Within the limit |
| Copper | Metals | 0.9 mg/L (90th percentile) | Distribution System | 1.3 mg/L (Action level) | Within the limit |
| Escherichia coli (E. coli) | Microbial | 0 (Maximum) | Distribution System Highest Number Of Detections | 0 (MCLG) | None detected |
| Chlorine Free | Other | 1.2 mg/L (Average) | Distribution System | 4 mg/L (MCL) | Within the limit |
| Perfluorobutanesulfonic acid | PFAS ("forever chemicals") | 6.7 (Reported level) | Well 3 | No federal limit | Detected — no federal limit |
| Perfluorohexanesulfonic acid | PFAS ("forever chemicals") | 3.2 (Reported level) | Well 7 | No federal limit | Detected — no federal limit |
| PFOA | PFAS ("forever chemicals") | 13 (Reported level) | Well 3 | No federal limit | Detected — no federal limit |
| PFOS | PFAS ("forever chemicals") | 30 (Reported level) | Well 7 | No federal limit | Detected — no federal limit |
| Combined Radium | Radionuclides | Not detected pCi/L (Average) | Groundwater | 5 pCi/L (MCL) | None detected |
| Gross Alpha | Radionuclides | Not detected pCi/L (Average) | Groundwater | 15 pCi/L (MCL) | Within the limit |
| Uranium | Radionuclides | Not detected pCi/L (Average) | Groundwater | 20 pCi/L (MCL) | None detected |

## What these contaminants are

- **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.
- **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.
- **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.
- **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.
- **Perfluorohexanesulfonic acid** — Perfluorohexanesulfonic acid, a PFAS 'forever chemical.' Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
- **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.
- **Combined Radium** — Combined radium-226 and radium-228 — naturally occurring radioactive elements. Long-term exposure above the federal limit increases the risk of bone cancer.
- **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._