Drinking water quality · 2023
· Verified
· PWSID CA1910194
What's in Rowland Water District — Rowland Heights, Ca, CA tap water
1 contaminant in Rowland Water District — Rowland Heights, Ca, CA's water sat at or above a federal limit, led by PFOA at 1.2x the limit.
- !1 contaminant at or above a federal limit — worst is PFOA at 1.2x
- !3 contaminants within 20% of a limit
- !14 of 27 core regulated contaminants reported — 13 never appear in this report
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −15 contaminants at or above a federal limit
- −12 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −8 core regulated contaminants never reported (14/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- PFOA1.2× the federal limit0–4.7 ng/L · limit 4 ng/L
Linked to cancer, liver damage, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
Higher than 60% of CA systems that report it · higher than 65% of U.S. systems
- Turbidity95% of the federal limit0.4–0.95 NTU · limit 1 NTU
High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.
Higher than 75% of CA systems that report it · higher than 80% of U.S. systems
- Chlorine Total90% of the federal limit0.95–3.61 mg/L · limit 4 mg/L
Higher than 95% of CA systems that report it · higher than 90% of U.S. systems
- PFOS85% of the federal limit0–3.4 ng/L · limit 4 ng/L
Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
Higher than 40% of CA systems that report it · higher than 50% of U.S. systems
+44 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 8.6–51.4 ug/L | 80 ug/L |
| Trichloroethylene | 0–2.7 ug/L | 5 ug/L |
| HAA5 | 2.1–30.6 ug/L | 60 ug/L |
| Nitrate Nitrite | 4–4.7 mg/L | 10 mg/L |
| Nitrate | 0–4.2 mg/L | 10 mg/L |
| Perfluorohexanesulfonic acid | 0–2.7 ng/L | 10 ng/L |
| Gross Alpha | 0–3.81 pCi/L | 15 pCi/L |
| Tetrachloroethylene | 0–1.1 ug/L | 5 ug/L |
| Combined Radium | 0–1.02 pCi/L | 5 pCi/L |
| Bromate | 2 ug/L | 10 ug/L |
| Fluoride | 0.3–0.8 mg/L | 4 mg/L |
| Barium | 140 ug/L | 2000 ug/L |
| Chlorate | 80 ug/L | 800 ug/L |
| Perchlorate | 0.89–1.8 ug/L | — |
| Chloride | 96–116 mg/L | — |
| Sulfate | 200–250 mg/L | — |
| Aluminum | 0–150 ug/L | — |
| Boron | 140 ug/L | 1 ug/L |
| Calcium | 59–76 mg/L | — |
| Chromium, Hexavalent | 2.6–3.4 ug/L | — |
| Lithium | 32–47 ug/L | — |
| Magnesium | 25–29 mg/L | — |
| Potassium | 4.6–5.4 mg/L | — |
| Sodium | 93–117 mg/L | — |
| Vanadium | 3.4–3.9 ug/L | 50 ug/L |
| Escherichia coli (E. coli) | 0 % | — |
| Total Coliform | 0 % | — |
| Nonafluoro-3,6-dioxaheptanoic acid | 8 ng/L | — |
| Perfluorobutanesulfonic acid | 0–3.8 ng/L | 500 ng/L |
| Perfluoroheptanoic acid | 0–3.1 ng/L | — |
| Perfluorohexanoic acid | 3.2–5.7 ng/L | — |
| Perfluoropentanoic acid | 0–5.5 ng/L | — |
| PFBA | 0–3.5 ng/L | — |
| Alkalinity | 170–180 mg/L | — |
| Bicarbonate | 210 mg/L | — |
| Color | 1 | — |
| Hardness | 241–303 mg/L | — |
| Odor | 1 | — |
| pH | 7.9–8.6 | — |
| Specific Conductance | 912–1080 | — |
| TOC | 2.4 mg/L | — |
| Total Dissolved Solids | 573–690 mg/L | — |
| Gross Beta Particle Activity | 0–5 pCi/L | — |
| Uranium | 1.6–3.4 pCi/L | 20 pCi/L |
What this report doesn't tell you
13 of the 27 contaminants a community water system normally reports do not appear anywhere in Rowland Water District — Rowland Heights, Ca, CA's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
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.