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Detailed report on nitrates levels detected in Garden Grove's public drinking water supply. Last updated 2026-02-03.
2.219 mg/L
Detected level is 22.2% of the EPA maximum contaminant level (10 mg/L)
Sample date: 2025-10-03
Overall Grade
Detected Level
2.219 mg/L
EPA Maximum (MCL)
10 mg/L
Percentage of Limit
22.2%
The detected level of nitrates in Garden Grove's water is below 50% of the EPA's maximum contaminant level. While any detection warrants awareness, this level is considered safe by federal standards. EPA MCL: 10 mg/L for nitrate as nitrogen.
This data is based on water quality testing performed on 2025-10-03. Water quality can vary over time, and we recommend checking for the most recent data periodically.
Garden Grove has 1 recorded violation related to nitrates.
monitoring violation
Status: Resolved
Nitrates are particularly dangerous for infants under 6 months, causing "blue baby syndrome" (methemoglobinemia). In adults, high nitrate levels may be linked to certain cancers and thyroid conditions.
Residents of Garden Grove should be aware that nitrates has been detected in the local water supply at 22.2% of the EPA limit. Current levels are within safe limits, but ongoing awareness is important.
Certain groups face higher risks from nitrates exposure:
Nitrates primarily come from agricultural fertilizer runoff, animal waste, septic systems, and natural decomposition. Agricultural areas tend to have higher nitrate levels.
Garden Grove draws its drinking water from a mix of surface water and groundwater sources. The city is served by 1 water system, including GARDEN GROVE WATER SYSTEM.
Nitrates was detected in Garden Grove's water at 2.219 mg/L, which is 22.2% of the EPA maximum. This is within federal safety limits. Consider a certified water filter for extra peace of mind, particularly if you have young children or are in a vulnerable health group.
The following filtration methods are proven effective at reducing or removing nitrates from drinking water:
Reverse Osmosis
Ion Exchange
Distillation
When choosing a filter, look for NSF/ANSI certification specific to nitrates removal. Not all filters are equally effective, and certification ensures the product has been independently tested.
See Filter Recommendations for Garden GroveBased on the most recent testing data, nitrates was detected in Garden Grove, California water at a level of 2.219 mg/L. This is 22.2% of the EPA maximum contaminant level of 10 mg/L. EPA MCL: 10 mg/L for nitrate as nitrogen.
Nitrates was detected in Garden Grove's water at 22.2% of the EPA limit, which is considered safe by federal standards. Nitrates are particularly dangerous for infants under 6 months, causing "blue baby syndrome" (methemoglobinemia). In adults, high nitrate levels may be linked to certain cancers and thyroid conditions. While current levels are not considered dangerous, some health organizations suggest minimizing exposure whenever possible.
The most effective methods for removing nitrates from your drinking water are: Reverse Osmosis, Ion Exchange, Distillation. When purchasing a filter, look for NSF/ANSI certification that specifically covers nitrates removal. Installation of a point-of-use filter (at your kitchen faucet or as an under-sink system) provides targeted protection for drinking and cooking water. For whole-house protection, a point-of-entry system can treat all water entering your home.
Yes, Garden Grove's water utility is required by the EPA to regularly test for nitrates as part of the Safe Drinking Water Act. The most recent testing detected nitrates at 2.219 mg/L. These results are published in the city's annual Consumer Confidence Report (CCR), also known as a Water Quality Report. You can also request additional testing information directly from your local water utility or have your home's water independently tested for a more specific assessment.
Full Water Quality Report
Garden Grove, California — All contaminants, scores, and violations
Filter Recommendations
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