ZipCheckup grade for 92313: C.
A mixed picture - some signals here are worth your attention.
Your top priority: have older plumbing checked for lead solder. Check your ZIP → EPA: reduce lead
Grand Terrace, CA: PFAS Above 2029 MCL Level - 57/100
EPA data combined for 2 water systems mapped to this ZIP (largest mapped system: Riverside Highland Water Company)
EPA records for the water systems mapped to 92313 in Grand Terrace, CA contain 2 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 2 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.0015 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
- Radon EPA Zone 2 - county-level radon potential, not a home measurement.
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Safety records for Grand Terrace (92313) contain exactly one critical finding.
Score Breakdown
Overall Home Safety Score: 57/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (8) HIGH
Your Water System
ZIP code 92313 in Grand Terrace, California is mapped to the water system Riverside Highland Water Company (EPA ID: CA3610057). This system provides water to approximately 20,188 people from groundwater sources.
There are 2 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Riverside Highland Water Company | CA3610057 | 20,188 | Groundwater |
| City of Colton, | CA3610014 | 46,525 | Groundwater |
Other Water Quality Reports in California
- 90001 (Los Angeles)
- 90002 (Los Angeles)
- 90003 (Los Angeles)
- 90004 (Los Angeles)
- 90005 (Los Angeles)
- 90006 (Los Angeles)
- 90007 (Los Angeles)
- 90008 (Los Angeles)
- 90009 (Los Angeles)
- 90010 (Los Angeles)
- 90011 (Los Angeles)
- 90012 (Los Angeles)
- 90013 (Los Angeles)
- 90014 (Los Angeles)
- 90015 (Los Angeles)
- 90016 (Los Angeles)
- 90017 (Los Angeles)
- 90018 (Los Angeles)
- 90019 (Los Angeles)
- 90020 (Los Angeles)
Nearby Water Quality Reports
- 92324 (Colton) - 1 mi - 3 violations recorded for mapped water systems
- 92350 (Loma Linda) - 3 mi - 1 violation recorded for mapped water systems
- 92357 (Loma Linda) - 3 mi
- 92354 (Loma Linda) - 4 mi - 2 violations recorded for mapped water systems
- 92507 (Riverside) - 4 mi - 2 violations recorded for mapped water systems
- 92501 (Riverside) - 4 mi - 1 violation recorded for mapped water systems
- 92408 (San Bernardino) - 4 mi - 2 violations recorded for mapped water systems
- 92412 (San Bernardino) - 5 mi
- 92318 (Bryn Mawr) - 5 mi
- 92410 (San Bernardino) - 5 mi - 1 violation recorded for mapped water systems
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Riverside Highland Water Company (CA3610057) on EPA.gov.
4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 92313. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.
Detected compounds: PFOS, PFOA, PFPeA, PFHxS, PFHxA, PFBS, PFBA, PFHpA, PFPeS.
Highest measured level: 0.019 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (10) CRITICAL
Home & Infrastructure (6) OK
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Grand Terrace
Based on local data for ZIP 92313, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Gutter Installation & Repair
The median home in 92313 was built around 1974. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsWindow Replacement
The median build year of homes in Grand Terrace is 1974; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.
Typical cost: Window replacement: typically $300–$800 per window installed
Estimate Your Home Maintenance CostsRoofing Inspection & Repair
Homes built around 1974 may be on their second or third roof. A professional inspection can catch damage before leaks start.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 92313 safe to drink?
EPA SDWIS records 2 violations since 2021 across the water systems mapped to ZIP 92313 (primary system: Riverside Highland Water Company), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 92313's water come from?
The recorded water source for Riverside Highland Water Company, a system mapped to ZIP code 92313, is Groundwater. This system serves approximately 20,188 people.
How does Grand Terrace water compare to the national average?
Grand Terrace's Home Safety Score ranks lower than 86% of U.S. ZIP codes, and lower than 96% of ZIP codes within California.
How can I get my water tested in Grand Terrace?
If Riverside Highland Water Company supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 92313 tap water?
The Lead and Copper Rule record selected for 92313 reports a 90th-percentile lead result of 0.0015 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
What is the radon risk for 92313?
92313 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in San Bernardino County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 92313's water?
Yes, PFAS have been detected in samples from water systems mapped to 92313. One or more PFAS results are above the level of a federal PFAS MCL with compliance required from 2029. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Grand Terrace, CA: PFAS Above 2029 MCL Level - 57/100. https://zipcheckup.com/report/92313/
@misc{zipcheckup-report-92313,
author = {{ZipCheckup}},
title = {{Grand Terrace, CA: PFAS Above 2029 MCL Level - 57/100}},
year = {2026},
url = {https://zipcheckup.com/report/92313/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 92313
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 92324 | Colton, CA | 1.5 mi | C | 3 |
| 92350 | Loma Linda, CA | 3.2 mi | C | 1 |
| 92357 | Loma Linda, CA | 3.2 mi | N/A | 0 |
| 92354 | Loma Linda, CA | 3.8 mi | C | 2 |
| 92507 | Riverside, CA | 4.1 mi | C | 2 |
| 92501 | Riverside, CA | 4.2 mi | B | 1 |
| 92408 | San Bernardino, CA | 4.3 mi | C | 2 |
| 92412 | San Bernardino, CA | 4.5 mi | N/A | 0 |
| 92318 | Bryn Mawr, CA | 4.8 mi | N/A | 0 |
| 92410 | San Bernardino, CA | 5.3 mi | C | 1 |
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