Drinking water quality · 2023
· Verified
What's in Riverside Highland Water Company — Grand Terrace, Ca, CA tap water
23 contaminants were measured in the Riverside Highland Water Company — Grand Terrace, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 3 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 23
- Over federal limit
- 3
- Approaching the limit
- 0
- Worst contaminant
- PFOA
- Service area
- CA
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0–14 ug/LRangeRhwc | 3 ug/LNL | At or above the limit |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–14 ug/LRangeRhwc | 3 ug/LNL | At or above the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–8.2 ug/LRangeRhwc | None set | At or above the limit |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 0–10 ug/LRangeRhwc | None set | Detected — no federal limit |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 0–14 ug/LRangeRhwc | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–18 ug/LRangeRhwc | 5.1 ug/LNL | Detected — no federal limit |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–12 ug/LRangeRhwc | 6.5 ug/LNL | Detected — no federal limit |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–17 ug/LRangeRhwc | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1.8–6.7 mg/LRangeSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.22–0.64 mg/LRangeSystem-wide | 4 mg/LMCL | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 1.4 mg/LReported levelBaseline Feeder | 4 mg/LMCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.9–3.5 ug/LRangeSystem-wide | None set | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 1.1 ug/LReported levelSystem-wide | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.29 ug/L90th percentileAt the tap | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | Within the limit |
+By source (2)— No. of Samples Collected, No. of Schools Requesting Lead Sampling
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.4 pCi/LReported levelThe City of San Bernardin | 15 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | Not detected pCi/LReported levelSystem-wide | 20 pCi/LMCL | None detected |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 4.8 ug/LReported levelSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | Not detected ug/LRangeSystem-wide | None set | None detected |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 0–1.7 ug/LRangeSystem-wide | None set | Within the limit |
+By source (2)— Baseline Feeder, The City of San Bernardin
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelThe City of San Bernardin | 0Public health goal | None detected |
+By source (3)— The City of San Bernardin, Baseline Feeder, No. of detections
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0Reported levelThe City of San Bernardin | 0Public health goal | None detected |
+By source (3)— The City of San Bernardin, No. of detections, Baseline Feeder
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | Not detectedReported levelThe City of San Bernardino | None set | None detected |
+By source (2)— The City of San Bernardino, Baseline Feeder
| |||
People also ask about Riverside Highland Water Company — Grand Terrace, Ca, CA's water
+Is Riverside Highland Water Company — Grand Terrace, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Riverside Highland Water Company — Grand Terrace, Ca, CA water utility lists 3 contaminants at or above the federal limit: PFOA, PFOS, and Perfluorohexanesulfonic acid. 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 Riverside Highland Water Company — Grand Terrace, Ca, CA tap water?
23 contaminants were measured in Riverside Highland Water Company — Grand Terrace, Ca, CA's 2023 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and disinfection byproducts. 11 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 Riverside Highland Water Company — Grand Terrace, Ca, CA tap water?
3 contaminants in Riverside Highland Water Company — Grand Terrace, Ca, CA's 2023 report sit at or above the federal limit: PFOA (3500.0× the limit); PFOS (3500.0× the limit); Perfluorohexanesulfonic acid (820.0× 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 Riverside Highland Water Company — Grand Terrace, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOA, at 3500.0× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Riverside Highland Water Company — Grand Terrace, 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 Riverside Highland Water Company — Grand Terrace, 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.