Drinking water quality · 2023
· Verified
What's in Rowland Water District — Rowland Heights, Ca, CA tap water
48 contaminants were measured in the Rowland Water District — Rowland Heights, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 48
- Over federal limit
- 1
- Approaching the limit
- 3
- Worst contaminant
- PFOA
- Service area
- CA
1.2× the limit
state-level CCR
At or above the federal limit
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
No federal drinking-water violations on record for this system.
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0–4.7 ng/LReported levelGround Water Miramar (TVMWD) | 5.1 ng/LNL | At or above the limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD) +1 more
| |||
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–3.4 ng/LReported levelGround Water Miramar (TVMWD) | 6.5 ng/LNL | Approaching the limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD) +1 more
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–2.7 ng/LReported levelGround Water Miramar (TVMWD) | 1000 ng/LNL | Within the limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| Nonafluoro-3,6-dioxaheptanoic acidNonafluoro-3,6-dioxaheptanoic acid, a PFAS-related compound. | 8 ng/LReported levelGround Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (3)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 0–3.8 ng/LReported levelGround Water Miramar (TVMWD) | 500 ng/LNL | Detected — no federal limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 0–3.1 ng/LReported levelGround Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (3)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 3.2–5.7 ng/LReported levelGround Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (3)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–5.5 ng/LReported levelGround Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (3)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–3.5 ng/LReported levelGround Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (3)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.4–0.95 NTUReported levelGround Water Miramar (TVMWD) | 1 NTUMCL | Approaching the limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Ground Water (CDWC), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| AlkalinityA measure of the water's capacity to neutralize acids. | 170–180 mg/LReported levelImported Ground Water (CDWC) | None set | Detected — no federal limit |
+By source (4)— Imported Ground Water (CDWC), Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD) +1 more
| |||
| Bicarbonate | 210 mg/LReported levelImported Ground Water (CDWC) | None set | Detected — no federal limit |
| ColorA measure of visible tint in the water. | 1Reported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 241–303 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Ground Water Miramar (TVMWD) +1 more
| |||
| OdorA measure of detectable smell in the water. | 1Reported levelImported Surface Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD), Imported Ground Water (CDWC) +1 more
| |||
| pHA measure of how acidic or basic the water is. | 7.9–8.6Reported levelImported Surface Water Miramar (TVMWD) | None set | Detected — no federal limit |
+By source (3)— Imported Surface Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC)
| |||
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 912–1080Reported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Ground Water Miramar (TVMWD) +1 more
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.4 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (2)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 573–690 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Ground Water Miramar (TVMWD) +1 more
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.95–3.61 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Approaching the limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
| Nitrate Nitrite | 4–4.7 mg/LReported levelImported Ground Water (CDWC) | 10 mg/LMCL | Within the limit |
+By source (4)— Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 8.6–51.4 ug/LReported levelImported Surface Water Weymouth (MWD) | None set | Within the limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 2.1–30.6 ug/LReported levelImported Surface Water Weymouth (MWD) | None set | Within the limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 2 ug/LReported levelImported Surface Water Weymouth (MWD) | None set | Within the limit |
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 80 ug/LReported levelImported Surface Water Weymouth (MWD) | 800 ug/LNL | Detected — no federal limit |
+By source (3)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD)
| |||
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0.89–1.8 ug/LReported levelImported Ground Water (CDWC) | None set | Detected — no federal limit |
+By source (4)— Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0–2.7 ug/LReported levelImported Ground Water (CDWC) | 5 ug/LMCL | Within the limit |
+By source (4)— Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0–1.1 ug/LReported levelImported Ground Water (CDWC) | 5 ug/LMCL | Within the limit |
+By source (4)— Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–4.2 mg/LReported levelGround Water Miramar (TVMWD) | 10 mg/LMCL | Within the limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Ground Water (CDWC), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.3–0.8 mg/LReported levelImported Surface Water Weymouth (MWD) | 4 mg/LMCL | Within the limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Ground Water Miramar (TVMWD), Imported Ground Water (CDWC) +1 more
| |||
| ChlorideA naturally occurring salt compound. | 96–116 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Imported Ground Water (CDWC) +1 more
| |||
| SulfateA naturally occurring mineral from rock and soil. | 200–250 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Imported Surface Water Miramar (TVMWD) +1 more
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–3.81 pCi/LReported levelImported Ground Water (CDWC) | 15 pCi/LMCL | Within the limit |
+By source (4)— Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0–1.02 pCi/LReported levelImported Ground Water (CDWC) | 0.019 pCi/LPublic health goal | Within the limit |
+By source (4)— Imported Ground Water (CDWC), Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD) +1 more
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 0–5 pCi/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (2)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD)
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.6–3.4 pCi/LReported levelGround Water Miramar (TVMWD) | 20 pCi/LMCL | Detected — no federal limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC) +1 more
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BariumA metal from erosion of natural deposits and industrial discharge. | 140 ug/LReported levelImported Ground Water (CDWC) | None set | Within the limit |
+By source (4)— Imported Ground Water (CDWC), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 0–150 ug/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Ground Water Miramar (TVMWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| BoronA naturally occurring element from rock and soil. | 140 ug/LReported levelImported Surface Water Weymouth (MWD) | 1 ug/LNL | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 59–76 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Ground Water Miramar (TVMWD) +1 more
| |||
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 2.6–3.4 ug/LReported levelImported Ground Water (CDWC) | None set | Detected — no federal limit |
+By source (4)— Imported Ground Water (CDWC), Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD) +1 more
| |||
| LithiumA naturally occurring element found in some groundwater. | 32–47 ug/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (2)— Imported Surface Water Weymouth (MWD), Ground Water Miramar (TVMWD)
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 25–29 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| PotassiumA naturally occurring mineral from rock and soil. | 4.6–5.4 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Ground Water (CDWC), Imported Surface Water Miramar (TVMWD) +1 more
| |||
| SodiumA naturally occurring salt component. | 93–117 mg/LReported levelImported Surface Water Weymouth (MWD) | None set | Detected — no federal limit |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Imported Ground Water (CDWC) +1 more
| |||
| Vanadium | 3.4–3.9 ug/LReported levelGround Water Miramar (TVMWD) | 50 ug/LNL | Detected — no federal limit |
+By source (4)— Ground Water Miramar (TVMWD), Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD) +1 more
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0 %Reported levelImported Surface Water Weymouth (MWD) | None set | None detected |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %Reported levelImported Surface Water Weymouth (MWD) | None set | None detected |
+By source (4)— Imported Surface Water Weymouth (MWD), Imported Surface Water Miramar (TVMWD), Ground Water Miramar (TVMWD) +1 more
| |||
Source: Rowland Water District — Rowland Heights, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about Rowland Water District — Rowland Heights, Ca, CA's water
+Is Rowland Water District — Rowland Heights, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Rowland Water District — Rowland Heights, Ca, CA water utility lists 1 contaminant at or above the federal limit: PFOA. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Rowland Water District — Rowland Heights, Ca, CA tap water?
48 contaminants were measured in Rowland Water District — Rowland Heights, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and pfas ("forever chemicals"). 16 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Rowland Water District — Rowland Heights, Ca, CA tap water?
One contaminant in Rowland Water District — Rowland Heights, Ca, CA's 2023 report sits at or above the federal limit: PFOA (1.2× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Rowland Water District — Rowland Heights, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOA, at 1.2× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Are any contaminants in Rowland Water District — Rowland Heights, Ca, CA tap water approaching the federal limit?
3 contaminants are between 80% and 100% of the federal limit in this report: Turbidity, Chlorine Total, and PFOS. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Rowland Water District — Rowland Heights, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Rowland Water District — Rowland Heights, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.
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