<div class="xbrl-content">
    <h3>Quarterly report pursuant to Section 13 or 15(d)</h3>
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                        <a class="menu-item current" href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1599">Notes to Financial Statements</a>
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                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1599">Note 1 - Organization</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1600">Note 2 - Summary of Significant Accounting Policies</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1601">Note 3 - Revenue Recognition</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1602">Note 4 - Lease Receivable</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1603">Note 5 - Inventory</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1604">Note 6 - Assets Held for Sale</a></li>
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                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1607">Note 9 - Accrued Liabilities</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1608">Note 10 - Leases</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1609">Note 11 - Notes Payable</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1610">Note 12 - Stockholders' Equity</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1611">Note 13 - Commitments and Contingencies</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1612">Note 14 - Subsequent Events</a></li>
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                        <a class="menu-item " href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1614">Notes Tables</a>
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                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1614">Note 2 - Summary of Significant Accounting Policies (Tables)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1615">Note 5 - Inventory (Tables)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1616">Note 7 - Property and Equipment, Net (Tables)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1617">Note 9 - Accrued Liabilities (Tables)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1618">Note 10 - Leases (Tables)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1619">Note 11 - Notes Payable (Tables)</a></li>
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                        <a class="menu-item " href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1621">Notes Details</a>
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                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1621">Note 1 - Organization (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1622">Note 2 - Summary of Significant Accounting Policies (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1623">Note 2 - Summary of Significant Accounting Policies - Antidilutive Securities Excluded From Computation of Earnings Per Share (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1624">Note 3 - Revenue Recognition (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1625">Note 4 - Lease Receivable (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1626">Note 5 - Inventory - Inventory (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1627">Note 6 - Assets Held for Sale (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1628">Note 7 - Property and Equipment, Net (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1629">Note 7 - Property and Equipment, Net - Property and Equipment, Net (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1630">Note 8 - Investments (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1631">Note 9 - Accrued Liabilities - Accrued Liabilities (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1632">Note 10 - Leases (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1633">Note 10 - Leases - Right-of-Use Assets and Related Lease Liabilities (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1634">Note 10 - Leases - Maturities of Lease Liabilities (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1635">Note 11 - Notes Payable (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1636">Note 11 - Notes Payable - Schedule of Notes Payable (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1637">Note 12 - Stockholders' Equity (Details Textual)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1638">Note 12 - Stockholders' Equity - Stock-based Compensation Expense (Details)</a></li>
                                                            <li><a href="https://ir.aquametals.com/all-sec-filings/xbrl_doc_only/1639">Note 14 - Subsequent Events (Details Textual)</a></li>
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        <h4>Note 5 - Inventory</h4>
        11a
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