# Crescenta Valley Cwd — La Crescenta, Ca, CA — Drinking Water Quality (2022)

> Contaminant levels for the Crescenta Valley Cwd — La Crescenta, Ca, CA public water system from its 2022 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/crescenta-valley-cwd-la-crescenta-ca/2022
- JSON API: https://www.thewatermap.com/api/water/ca/crescenta-valley-cwd-la-crescenta-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: 36
- Contaminants with a federal limit: 10
- Contaminants at or above the federal limit: 4
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Bromate | Disinfection byproducts | 0–12 ug/L (Range) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | At or above the limit |
| Chlorate | Disinfection byproducts | 19 ug/L (Reported level) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 6.2–31 ug/L (Range) | Crescenta Valley Water District | No federal limit | Within the limit |
| TTHM | Disinfection byproducts | 27.4–72.2 ug/L (Range) | Crescenta Valley Water District | No federal limit | Approaching the limit |
| Fluoride | Inorganic chemicals | 0.6–0.8 mg/L (Range) | Metropolitan Water District's F. E. Weymouth Plant | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 13.3–32.8 mg/L (Range) | Crescenta Valley Water District | 10 mg/L (MCL) | At or above the limit |
| Aluminum | Metals | 0.115 mg/L (Reported level) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| Arsenic | Metals | 0–4.9 ug/L (Range) | Crescenta Valley Water District | No federal limit | Within the limit |
| Barium | Metals | 0–0.15 mg/L (Range) | Crescenta Valley Water District | 2 mg/L (MCL) | Within the limit |
| Boron | Metals | 140 ug/L (Reported level) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| Calcium | Metals | 36–100 mg/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| Chromium, Hexavalent | Metals | 0.24–1.6 ug/L (Range) | Crescenta Valley Water District | 0.02 ug/L (Public health goal) | Detected — no federal limit |
| Lead | Metals | 0.56 ug/L (90th percentile) | At the tap | No federal limit | Within the limit |
| Magnesium | Metals | 12–35 mg/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| Potassium | Metals | 3.2–4.1 mg/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| Sodium | Metals | 39–55 mg/L (Range) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| Vanadium | Metals | 0–5.1 ug/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| Perfluorobutanesulfonic acid | PFAS ("forever chemicals") | 0–4.6 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Perfluoroheptanoic acid | PFAS ("forever chemicals") | 0.85–2.5 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Perfluorohexanesulfonic acid | PFAS ("forever chemicals") | 1.5–3.3 ng/L (Range) | System-wide | 3 ng/L (NL) | Within the limit |
| Perfluorohexanoic acid | PFAS ("forever chemicals") | 2.3–6.2 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Perfluoropentanesulfonic acid (PFPeS) | PFAS ("forever chemicals") | 0–0.93 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| Perfluoropentanoic acid | PFAS ("forever chemicals") | 2.4–6.4 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| PFBA | PFAS ("forever chemicals") | 0–4.1 ng/L (Range) | System-wide | No federal limit | Detected — no federal limit |
| PFOA | PFAS ("forever chemicals") | 1.5–4.3 ng/L (Range) | System-wide | 5.1 ng/L (NL) | At or above the limit |
| PFOS | PFAS ("forever chemicals") | 0.78–4 ng/L (Range) | System-wide | 6.5 ng/L (NL) | At or above the limit |
| Alkalinity | Physical & aggregate | 150–220 mg/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| Bicarbonate | Physical & aggregate | 150–220 mg/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| Hardness | Physical & aggregate | 140–390 mg/L (Range) | Crescenta Valley Water District | No federal limit | Detected — no federal limit |
| pH | Physical & aggregate | 8.6 (Reported level) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| TOC | Physical & aggregate | 1.8–3 (Range) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | Not detected NTU (Reported level) | Crescenta Valley Water District | No federal limit | None detected |
| Gross Alpha | Radionuclides | 2.4–7.5 pCi/L (Range) | Crescenta Valley Water District | 15 pCi/L (MCL) | Within the limit |
| Gross Beta Particle Activity | Radionuclides | 0–6 pCi/L (Range) | Metropolitan Water District's F. E. Weymouth Plant | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | 15–15 pCi/L (Range) | Crescenta Valley Water District | 20 pCi/L (MCL) | Detected — no federal limit |
| Tetrachloroethylene | VOCs & pesticides | 0–0.54 ug/L (Range) | Crescenta Valley Water District | 5 ug/L (MCL) | Within the limit |

## What these contaminants are

- **Bromate** — A disinfection byproduct formed when bromide-containing water is treated with ozone. Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.
- **Chlorate** — A byproduct that can form during disinfection, especially when hypochlorite solutions degrade. Has no enforceable federal limit but is on the EPA contaminant candidate list; high levels can affect the thyroid.
- **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.
- **Aluminum** — A common element sometimes used as a treatment coagulant. Regulated only as a secondary (cosmetic) standard; high levels can discolor water.
- **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.
- **Barium** — A metal from erosion of natural deposits and industrial discharge. Long-term exposure above the federal limit can raise blood pressure.
- **Boron** — A naturally occurring element from rock and soil. No enforceable federal limit; the EPA has issued a health advisory level.
- **Calcium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **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.
- **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.
- **Magnesium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **Potassium** — A naturally occurring mineral from rock and soil. Not federally regulated for health.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **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.
- **Perfluoroheptanoic acid** — Perfluoroheptanoic acid, a PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment.
- **Perfluorohexanesulfonic acid** — Perfluorohexanesulfonic acid, a PFAS 'forever chemical.' Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
- **Perfluorohexanoic acid** — Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent and widely detected.
- **Perfluoropentanesulfonic acid (PFPeS)** — Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment.
- **Perfluoropentanoic acid** — Perfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment.
- **PFBA** — Perfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment and the human body.
- **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.
- **Alkalinity** — A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
- **Hardness** — A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.
- **pH** — A measure of how acidic or basic the water is. Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.
- **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.
- **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.
- **Tetrachloroethylene** — An industrial solvent (PCE) used in dry cleaning and degreasing. A likely human carcinogen; long-term exposure above the federal limit can damage the liver and kidneys.

## 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._