# Rowland Water District — Rowland Heights, Ca, CA — Drinking Water Quality (2023)

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

- Page: https://www.thewatermap.com/water/ca/rowland-water-district-rowland-heights-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/rowland-water-district-rowland-heights-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: 39
- Contaminants with a federal limit: 10
- 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 |
|---|---|---|---|---|---|
| Bromate | Disinfection byproducts | 2 ug/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Within the limit |
| Chlorate | Disinfection byproducts | 80 ug/L (Reported level) | Imported Surface Water Weymouth (MWD) | 800 ug/L (NL) | Detected — no federal limit |
| HAA5 | Disinfection byproducts | 2.1–30.6 ug/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Within the limit |
| Perchlorate | Disinfection byproducts | 0.89–1.4 ug/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Detected — no federal limit |
| Chloride | Inorganic chemicals | 96–116 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Fluoride | Inorganic chemicals | 0.3–0.7 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | 4 mg/L (MCL) | Within the limit |
| Nitrate | Inorganic chemicals | 0–4.2 mg/L (Reported level) | Ground Water Miramar (TVMWD) | 10 mg/L (MCL) | Within the limit |
| Sulfate | Inorganic chemicals | 200–250 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Aluminum | Metals | 0–150 ug/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Barium | Metals | 140 ug/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Within the limit |
| Boron | Metals | 140 ug/L (Reported level) | Imported Surface Water Weymouth (MWD) | 1 ug/L (NL) | Detected — no federal limit |
| Calcium | Metals | 59–76 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Lead | Metals | 31–0 ug/L (Reported level) | Imported Surface Water Miramar (TVMWD) | No federal limit | None detected |
| Lithium | Metals | 32–40 ug/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Magnesium | Metals | 25–29 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Potassium | Metals | 4.6–5.4 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Sodium | Metals | 93–117 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Vanadium | Metals | 3.4–3.65 ug/L (Reported level) | Ground Water Miramar (TVMWD) | 50 ug/L (NL) | Detected — no federal limit |
| Total Coliform | Microbial | 0 % (Reported level) | Imported Ground Water (CDWC) | No federal limit | None detected |
| Chlorine Total | Other | 0.95–3.61 mg/L (Reported level) | Imported Surface Water Miramar (TVMWD) | No federal limit | Approaching the limit |
| Chromium | Other | 2.6–3 ug/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Within the limit |
| Nitrate Nitrite | Other | 4–4.35 mg/L (Reported level) | Imported Ground Water (CDWC) | 10 mg/L (MCL) | Within the limit |
| Pce | Other | 0–1.1 ug/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Within the limit |
| Tce | Other | 0–2.7 ug/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Within the limit |
| PFBA | PFAS ("forever chemicals") | 0–3.5 ng/L (Reported level) | Ground Water Miramar (TVMWD) | No federal limit | Detected — no federal limit |
| Alkalinity | Physical & aggregate | 170–180 mg/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Detected — no federal limit |
| Bicarbonate | Physical & aggregate | 210 mg/L (Reported level) | Imported Ground Water (CDWC) | No federal limit | Detected — no federal limit |
| Color | Physical & aggregate | 1 (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Hardness | Physical & aggregate | 241–303 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Odor | Physical & aggregate | 1 (Reported level) | Ground Water Miramar (TVMWD) | No federal limit | Detected — no federal limit |
| pH | Physical & aggregate | 7.9–8.25 (Reported level) | Imported Surface Water Miramar (TVMWD) | No federal limit | Detected — no federal limit |
| Specific Conductance | Physical & aggregate | 912–1080 (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| TOC | Physical & aggregate | 2.4 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Total Dissolved Solids | Physical & aggregate | 573–690 mg/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 0.4–0.95 NTU (Reported level) | Ground Water Miramar (TVMWD) | 1 NTU (MCL) | Approaching the limit |
| Combined Radium | Radionuclides | 0–1.02 pCi/L (Reported level) | Imported Ground Water (CDWC) | 0.019 pCi/L (Public health goal) | Within the limit |
| Gross Alpha | Radionuclides | 0–3.81 pCi/L (Reported level) | Imported Ground Water (CDWC) | 15 pCi/L (MCL) | Within the limit |
| Gross Beta Particle Activity | Radionuclides | 0–5 pCi/L (Reported level) | Imported Surface Water Weymouth (MWD) | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | 1.6–3.4 pCi/L (Reported level) | Ground Water Miramar (TVMWD) | 20 pCi/L (MCL) | Detected — no federal 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.
- **Perchlorate** — A chemical used in rocket fuel and fireworks that can also form during disinfection. Can interfere with thyroid hormone production; has no national enforceable limit but is regulated in some states.
- **Chloride** — A naturally occurring salt compound. Regulated only as a secondary (cosmetic) standard; high levels cause a salty taste and can corrode pipes.
- **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.
- **Sulfate** — A naturally occurring mineral from rock and soil. No health-based federal limit; high levels can have a laxative effect and a bitter taste.
- **Aluminum** — A common element sometimes used as a treatment coagulant. Regulated only as a secondary (cosmetic) standard; high levels can discolor water.
- **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.
- **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.
- **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.
- **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.
- **PFBA** — Perfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' Monitored under EPA rules; persistent in the environment and the human body.
- **Alkalinity** — A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
- **Color** — A measure of visible tint in the water. Regulated only as a secondary (cosmetic) standard.
- **Hardness** — A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.
- **Odor** — A measure of detectable smell in the water. Regulated only as a secondary (cosmetic) standard.
- **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.
- **Specific Conductance** — A measure of how well water conducts electricity, which tracks dissolved mineral content. Not federally regulated for health; used as a proxy for total dissolved solids.
- **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.
- **Total Dissolved Solids** — Total dissolved solids — the combined content of all dissolved minerals and salts. Regulated only as a secondary (cosmetic) standard; high levels affect taste and hardness.
- **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.
- **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.
- **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.

## 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._