Nitrate-Nitrite in Connecticut Drinking Water
By Alexander Snyder, Founder & Water Quality Data Lead
The EPA legal or regulatory limit for Nitrate-Nitrite is 10 mg/L, but the health-protective reference published by EWG is 0.14 ppm. That health reference is roughly 71x stricter than the legal value.
Nitrate-Nitrite is listed in preserved public-system records associated with 85 Connecticut ZIP codes. This page summarizes record coverage and governed reference values. It does not establish that nitrate-nitrite is present at a property, identify its serving utility, or determine exposure, safety, or health risk.
What Is Nitrate-Nitrite?
Nitrate-nitrite is a combined measure expressed as nitrogen. OEHHA treats the combined goal separately from the individual nitrate and nitrite goals and limits nitrite's contribution within the combined value.
Review Nitrate-Nitrite Records Near You
Enter a Connecticut ZIP code to review associated public-system or regional monitoring records. The lookup does not identify the serving utility or measure a property.
Check Your ZIP CodeHealth Effects of Nitrate-Nitrite
- Cancer
- Fetal-development Effects
- Child-development Effects
These are source-classified outcomes in the exact EWG release, not a diagnosis, exposure determination, or finding about a property. See the cited reference below.
Safety Guidelines
Health Guideline
0.14 ppm
Source: EWG
Legal Limit (Limit)
10 mg/L
Regulatory limit
Nitrate-Nitrite's health-protective reference is roughly 71x stricter than the legal or regulatory limit.
| Standard | Level | Source |
|---|---|---|
| EPA legal or regulatory limit | 10 mg/L | EPA — legal/regulatory context |
| Health-protective reference | 0.14 ppm | EWG |
| Gap | ~71x stricter than legal | |
How to Reduce Nitrate-Nitrite in Your Water
The reviewed certification sources include an exact Nitrate/nitrite reduction claim under NSF/ANSI 58. Certification is product- and claim-specific; the standard number alone does not prove that a product reduces nitrate-nitrite.
- 1Confirm the analyte and concentration at the relevant tap or well with a certified laboratory before choosing treatment; a ZIP-associated record is not a property result.
- 2Choose a specific current product whose independent certification listing and performance data sheet explicitly name the exact reduction claim. A standard number by itself is not an analyte claim.
- 3Follow the certified product's inlet conditions, installation, service-life, and replacement instructions, then retest treated water to verify performance at the property.
Certification verifies a named reduction claim under defined test conditions; it does not certify that every installation reaches CheckYourTap's EWG/OEHHA health reference.
Who May Need Closer Review?
The governed EWG release classifies the following household groups as priorities for nitrate-nitrite context. This classification does not lower or multiply the cited reference and does not determine anyone's exposure.
Confirm the serving utility and use a certified property sample before making a health, exposure, or treatment decision.
Reading this inside ChatGPT or Claude?
This page can explain the general science about Nitrate-Nitrite records associated with a ZIP, but it cannot identify what is at a specific tap or property. You can get ZIP-level context two ways:
- Inside the chat: ask your assistant to “check my tap water with CheckYourTap”. Our connector returns available public-system or regional monitoring records associated with your ZIP. It does not identify your serving utility or test your tap, well, or property. The current connector is read-only and does not email reports or submit contact information.
- On the web: open CheckYourTap.com and enter your ZIP code for a free ZIP-level report.
Need to confirm Nitrate-Nitrite at a property?
A certified sample from the relevant tap or well can establish whether nitrate-nitrite is present before any health, filtration, or treatment decision.
CheckYourTap is an independent water-quality service, not your town or utility. We connect you with a vetted local partner. Your online report is free. Testing and treatment are paid services, and there's no cost to talk.
Frequently Asked Questions
Is Nitrate-Nitrite in my tap water?▾
What treatment guidance is released for Nitrate-Nitrite?▾
What reference values are shown for Nitrate-Nitrite?▾
Related Contaminants
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Sources
The exact released health reference and the reviewed sources for this definition are listed below:
About This Report
This page restores the preserved Connecticut route and historical public-record catalog. It does not publish the catalog’s old percentages or promote its stored threshold fields. Exact released health references come from EWG or California OEHHA; EPA material is legal, regulatory, and source context. CheckYourTap is an independent water-quality service funded by Valiant Energy Solutions, a Connecticut water quality and energy services company established in 1930.
This report is general information, not medical advice or a substitute for certified laboratory testing. Talk to your pediatrician or physician about specific health concerns.
Unmatched analytes remain visible without a numeric health verdict. Last reviewed August 2026.