92313
Grand Terrace, CA
San Bernardino County · Riverside-San Bernardino-Ontario, CA metro area
RIVERSIDE HIGHLAND WATER COMPANY

Is Grand Terrace tap water safe to drink?

Higher concern
Last tested: January 2025
Source: Official EPA UCMR5 federal monitoring data. Last tested January 2025.
Township:
  • San Bernardino CCD, CA
Neighborhoods:
  • East Colton Heights
  • Bethune
  • West Colton
  • Bunker Hill
  • Grand Terrace
  • Rana

The short answer for Grand Terrace

Grand Terrace tap water has 9 contaminants above EPA guidelines, including PFOS at 4.8× the limit (tested January 2025). See the full compound-by-compound breakdown and filter recommendations.

The health risk for Grand Terrace

PFAS ('forever chemicals') have been detected above EPA limits in this water system's most recent tests. These synthetic chemicals do not break down in the body and are linked to a range of health effects. A certified filter is strongly recommended.
  • PFBS, PFHpA, PFHxS, PFOA, PFOS, PFPeA above limit.
PFOS concentration (µg/L) January 2025
0 µg/L 0.004 µg/L 0.02 µg/L
0.019 µg/L
Detected
µg/L
0.004 µg/L
EPA limit
guideline
375% above limit
Comparison
vs. guideline
EPA limit: 0.004 µg/L | Your water: 0.019 µg/L
Certified Filters for Grand Terrace Tap Water

PFOS (a PFAS 'forever chemical') was detected above EPA limits. These filters are independently certified to reduce common drinking-water contaminants.

Water filter recommendation for Grand Terrace tap water: Epic Pure XP Water Filter Pitcher
Pitcher filter
Epic Pure XP Water Filter Pitcher
NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.
NSF/ANSI 42, 53, 401 & P473Removes 99.99% PFASMade in USABPA-free
Best for renters or quick setup. No installation needed.
Get the Epic Pure XP →
Most elevated compounds
Compound Measurement EPA Limit Comparison
PFOS
Tested: January 2025 · Well RN 17		 0.019 µg/L 0.004 µg/L 375% above limit
PFBS
Tested: January 2025 · Well RN 17		 0.012 µg/L 0.003 µg/L 300% above limit
PFOA
Tested: January 2025 · Well RN 17		 0.015 µg/L 0.004 µg/L 275% above limit
PFPeA
Tested: January 2025 · Well RN 17		 0.010 µg/L 0.003 µg/L 223% above limit
PFHxS
Tested: January 2025 · Well RN 17		 0.011 µg/L 0.004 µg/L 175% above limit
View all tested compounds

Well RN 17 · Tested: January 2025

Compound Measurement EPA Limit Comparison
PFOS 0.019 µg/L 0.004 µg/L 375% above limit
PFBS 0.012 µg/L 0.003 µg/L 300% above limit
PFOA 0.015 µg/L 0.004 µg/L 275% above limit
PFPeA 0.010 µg/L 0.003 µg/L 223% above limit
PFHxS 0.011 µg/L 0.004 µg/L 175% above limit
PFHpA 0.005 µg/L 0.003 µg/L 70% above limit
lithium 9.300 µg/L 10 µg/L 93% of limit
PFHxA 0.009 µg/L 3 µg/L 0.3% of limit
PFBA 0.010 µg/L 6 µg/L 0.2% of limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Well Lytle Creek 8 · Tested: January 2025

Compound Measurement EPA Limit Comparison
PFBS 0.005 µg/L 0.003 µg/L 57% above limit
PFHxS 0.005 µg/L 0.004 µg/L 38% above limit
PFHxA 0.006 µg/L 3 µg/L 0.2% of limit
lithium <9.000 µg/L 10 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFPeA <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

7th & Chicago · Tested: November 2023

Compound Measurement EPA Limit Comparison
PFPeA 0.003 µg/L 0.003 µg/L 10% above limit
lithium 9.100 µg/L 10 µg/L 91% of limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFHxA <0.003 µg/L 3 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Well Lytle Creek 10 · Tested: January 2025

Compound Measurement EPA Limit Comparison
lithium 10.000 µg/L 10 µg/L 100% of limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFHxA <0.003 µg/L 3 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFPeA <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Water utilities serving ZIP 92313

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Frequently Asked Questions about ZIP 92313 Tap Water

What contaminants are above EPA limits in ZIP 92313?

ZIP 92313 has 9 contaminants above EPA health guidelines in the latest available data, including PFOS at 4.8x the EPA guideline. The full table on this page lists every tested compound and its measured level.

Will boiling ZIP 92313 tap water remove PFOS?

No. Boiling does not remove PFAS, and the compounds can actually become more concentrated as water evaporates. To reduce PFAS at home, use a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis).

Do basic pitcher filters remove PFOS?

Most basic pitcher filters are only certified to NSF/ANSI 42 or 53, which do not cover PFAS. Look for a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis) on the spec sheet.

Who provides tap water in ZIP 92313?

Public records identify RIVERSIDE HIGHLAND WATER COMPANY as a primary water system associated with ZIP 92313. Service boundaries can vary by address, so confirm exact service with the utility.

When was ZIP 92313 tap water last tested?

The most recent test date used in this report is January 2025. EnviroClarity last refreshed this page on 2026-05-04.

Where can I find the official water quality report for ZIP 92313?

Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact RIVERSIDE HIGHLAND WATER COMPANY or visit their website for the latest official report covering ZIP 92313. The EPA also maintains a national CCR locator.

Primary source EPA UCMR5 (2023-2025)
Guideline source EPA PFAS drinking water standard (PFOS: 0,004 µg/L, effective 2024, compliance by 2031)
Last tested January 2025
Last page update 2026-05-04

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    Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.

    Protect your water in Grand Terrace → see certified filters