CCPA Privacy Notice
Last updated: March 23, 2026
This CCPA Privacy Notice supplements the information contained in our Privacy Policy and applies solely to visitors, users, and others who reside in the State of California ("consumers" or "you"). This notice is provided in compliance with the California Consumer Privacy Act of 2018 (CCPA) as amended by the California Privacy Rights Act (CPRA).
1. Information We Collect
In the preceding 12 months, CircumferencetoDiameter.net has collected the following categories of personal information from consumers:
| Category | Examples | Collected |
|---|---|---|
| A. Identifiers | Name, email address, IP address | Yes |
| B. Personal Information (Cal. Civ. Code § 1798.80(e)) | Name, email address | Yes |
| C. Protected Classification Characteristics | Age, race, gender, religion | No |
| D. Commercial Information | Purchase history, products or services purchased | No |
| E. Biometric Information | Fingerprints, facial recognition | No |
| F. Internet or Network Activity | Browsing history, search history, interaction with website | Yes |
| G. Geolocation Data | Physical location | No (approximate only via IP) |
| H. Sensory Data | Audio, visual, thermal information | No |
| I. Professional or Employment Information | Job title, employer | No |
| J. Education Information | Student records | No |
| K. Inferences | Consumer profiles or preferences | No |
| L. Sensitive Personal Information | SSN, financial data, precise geolocation | No |
2. Sources of Personal Information
We obtain the categories of personal information listed above from the following sources:
- Directly from you — Information you voluntarily provide when submitting our contact form.
- Automatically — Technical data collected automatically when you visit our Website (e.g., IP address, browser type, pages viewed) through our hosting provider and analytics services.
3. Use of Personal Information
We may use the personal information we collect for one or more of the following business purposes:
- To respond to your inquiries and provide customer support
- To improve, personalize, and optimize our Website and Services
- To detect, prevent, and address security issues and abuse
- To comply with legal obligations
4. Sale and Sharing of Personal Information
We do not sell your personal information. CircumferencetoDiameter.net has not sold any consumer's personal information in the preceding 12 months and has no plans to do so.
We do not share your personal information for cross-context behavioral advertising. We do not use advertising cookies or participate in ad networks.
5. Your CCPA Rights
As a California resident, you have the following rights under the CCPA/CPRA:
5.1 Right to Know (Access)
You have the right to request that we disclose:
- The categories of personal information we've collected about you
- The categories of sources from which we collected it
- Our business purpose for collecting that information
- The categories of third parties with whom we share that information
- The specific pieces of personal information we've collected about you
5.2 Right to Delete
You have the right to request that we delete any personal information we have collected about you, subject to certain exceptions provided by law (such as compliance with legal obligations or completing a pending transaction).
5.3 Right to Correct
You have the right to request that we correct inaccurate personal information that we maintain about you.
5.4 Right to Opt-Out of Sale
Since we do not sell personal information, this right does not currently apply. However, if our practices change in the future, we will provide a clear "Do Not Sell or Share My Personal Information" link.
5.5 Right to Limit Use of Sensitive Personal Information
Since we do not collect sensitive personal information, this right does not currently apply.
5.6 Right to Non-Discrimination
We will not discriminate against you for exercising any of your CCPA rights. We will not:
- Deny you goods or services
- Charge you different prices or rates
- Provide you a different level or quality of services
- Suggest that you will receive a different price or quality of service
6. How to Exercise Your Rights
To exercise your CCPA rights, you can submit a verifiable consumer request by:
- Email: contact@CircumferencetoDiameter.net
- Subject Line: "CCPA Data Request"
- Contact Form: circumferencetodiameter.net/contact-us
Verification Process
To protect your privacy, we must verify your identity before processing your request. We may ask you to:
- Confirm the email address associated with your inquiry
- Provide additional identifying information that matches our records
We will respond to verifiable consumer requests within 45 days of receipt. If more time is needed (up to an additional 45 days), we will notify you in writing.
Authorized Agents
You may designate an authorized agent to make a request on your behalf. To do so, you must provide the agent with signed, written permission and we may require you to verify your identity directly with us.
7. Disclosure of Personal Information to Third Parties
In the preceding 12 months, we have disclosed the following categories of personal information to third parties for business purposes:
| Category | Third Party | Purpose |
|---|---|---|
| Identifiers (name, email) | Web3Forms | Processing contact form submissions |
| Internet Activity (pages viewed) | Analytics services | Anonymous website analytics |
| Technical Data (IP, browser) | Vercel | Website hosting, security, and performance |
8. California "Shine the Light" Law
Under California Civil Code Section 1798.83 ("Shine the Light" law), California residents may request information regarding the disclosure of personal information to third parties for direct marketing purposes. Since we do not disclose personal information to third parties for direct marketing purposes, this provision does not apply.
9. California Online Privacy Protection Act (CalOPPA)
In accordance with CalOPPA, we agree to the following:
- Users can visit our Website anonymously
- Our Privacy Policy is clearly linked on our homepage and accessible from every page via the footer
- Our Privacy Policy link includes the word "Privacy" and is easy to find
- We will notify users of Privacy Policy changes on our Privacy Policy page
- Users can change their personal information by contacting us via email
10. Do Not Track Signals
We respect Do Not Track (DNT) browser signals. When we detect a DNT signal, we will not track your browsing activity across other websites.
11. Changes to This Notice
We may update this CCPA Privacy Notice from time to time. Any changes will be posted on this page with an updated "Last updated" date.